That means "Registered with the United States Patent Office".
Patent Applied For.
"Pat Pend" refers to a patent pending status, indicating that a patent application has been filed but not yet granted. It does not refer to a specific invention.
U.S pat: #2,415,012
"Design patent" is the meaning of the English abbreviation "des. pat." The term refers to the U.S. Patent Office's protection of the ornamental and stylistic aspects of the item in question.
what is the US patent 878354 A
the patent was issued in 1953. funny thing is jaymar stamped pat#2,641,135 where in fact the real patent number is 2,641,153
There is no US patent 555408021. There is also no US patent 55408021.
No way to tell. You can look up that patent, and it will tell you what year that patent was granted- but there is no way of telling when it was made, other than AFTER that patent was granted.
Tesla invented fluorescent lighting, the Tesla induction motor, the Tesla coil, and developed the alternating current (AC) electrical supply system that included a motor and transformer, and 3-phase electricity and the modern radio. US Patent 11,865 Method Of Insulating Electric Conductors US Patent 334,823 Commutator For Dynamo-Electric Machines US Patent 335,786 Electric-Arc Lamp US Patent 335,787 Electric-Arc Lamp US Patent 336,961 Regulator For Dynamo-Electric Machines US Patent 336,962 Regulator For Dynamo-Electric Machines US Patent 350,954 Regulator For Dynamo-Electric Machines US Patent 359,748 Dynamo-Electric Machine US Patent 381,968 Electro-Magnetic Motor US Patent 381,969 Electro-Magnetic Motor US Patent 381,970 System Of Electrical Distribution US Patent 382,279 Electro-Magnetic Motor US Patent 382,280 Electrical Transmission Of Power US Patent 382,281 Electrical Transmission Of Power US Patent 382,282 Method Of Converting And Distributing Electric Currents US Patent 382,845 Commutator For Dynamo-Electric Machines US Patent 390,413 System Of Electrical Distribution US Patent 390,414 Dynamo-Electric Machine US Patent 390,415 Dynamo-Electric Machine Or Motor US Patent 390,721 Dynamo-Electric Machine US Patent 390,820 Regulator For Alternate-Current Motors US Patent 396,121 Thermo-Magnetic Motor US Patent 401,520 Method Of Operating Electro-Magnetic Motors US Patent 405,858 Electro-Magnetic Motor US Patent 405,859 Method Of Electrical Power Transmission US Patent 406,968 Dynamo-Electric Machine US Patent 413,353 Method Of Obtaining Direct From Alternating Currents US Patent 416,191 Electro-Magnetic Motor US Patent 416,192 Method Of Operating Electro-Magnetic Motors US Patent 416,193 Electro-Magnetic Motor US Patent 416,194 Electric Motor US Patent 416,195 Electro-Magnetic Motor US Patent 417,794 Armature For Electric Machines US Patent 418,248 Electro-Magnetic Motor US Patent 424,036 Electro-Magnetic Motor US Patent 428,057 Pyromagneto-Electric Generator US Patent 433,700 Alternating-Current Electro-Magnetic Motor US Patent 433,701 Alternating-Current Motor US Patent 433,702 Electrical Transformer Or Induction Device US Patent 433,703 Electro-Magnetic Motor US Patent 445,207 Electro-Magnetic Motor US Patent 447,920 Method Of Operating Arc-Lamps US Patent 447,921 Alternating Electric Current Generator US Patent 454,622 System Of Electric Lighting US Patent 455,067 Electro-Magnetic Motor US Patent 455,068 Electrical Meter US Patent 455,069 Electric Incandescent Lamp US Patent 459,772 Electro-Magnetic Motor US Patent 462,418 Method Of And Apparatus For Electrical Conversion And Distribution US Patent 464,666 Electro-Magnetic Motor US Patent 464,667 Electrical Condenser US Patent 487,796 System Of Electrical Transmission Of Power US Patent 511,559 Electrical Transmission Of Power US Patent 511,560 System Of Electrical Power Transmission US Patent 511,915 Electrical Transmission Of Power US Patent 511,916 Electric Generator US Patent 512,340 Coil For Electro-Magnets US Patent 514,167 Electrical Conductor US Patent 514,168 Means For Generating Electric Currents US Patent 514,169 Reciprocating Engine US Patent 514,170 Incandescent Electric Light US Patent 514,972 Electric Railway System US Patent 514,973 Electrical Meter US Patent 517,900 Steam Engine US Patent 524,426 Electromagnetic Motor US Patent 555,190 Alternating Motor US Patent 567,818 Electrical Condenser US Patent 568,176 Apparatus For Producing Electric Currents Of High Frequency And Potential US Patent 568,177 Apparatus For Producing Ozone US Patent 568,178 Method Of Regulating Apparatus For Producing Electric Currents Of High Frequency US Patent 568,179 Method Of And Apparatus For Producing Currents Of High Frequency US Patent 568,180 Apparatus For Producing Electrical Currents Of High Frequency US Patent 577,670 Apparatus For Producing Electric Currents Of High Frequency US Patent 577,671 Manufacture Of Electrical Condensors, Coils And Similar Devices US Patent 583,953 Apparatus For Producing Currents Of High Frequency US Patent 593,138 Electrical Transformer US Patent 609,245 Electrical Circuit Controller US Patent 609,246 Electric Circuit Controller US Patent 609,247 Electric Circuit Controller US Patent 609,248 Electric Circuit Controller US Patent 609,249 Electric Circuit Controller US Patent 609,250 Electrical Igniter For Gas Engines US Patent 609,251 Electric Circuit Controller US Patent 611,719 Electrical Circuit Controller US Patent 613,735 Electric Circuit Controller US Patent 613,809 Method Of And Apparatus For Controlling Mechanism Of Moving Vessels Or Vehicles US Patent 645,576 System Of Transmission Of Electrical Energy US Patent 649,621 Apparatus For Transmission Of Electrical Energy US Patent 655,838 Method Of Insulating Electric Conductors US Patent 685,012 Means For Increasing The Intensity Of Electrical Oscillations US Patent 685,953 Method Of Intensifying And Utilizing Effects Transmitted Through Natural Media US Patent 685,954 Method Of Utilizing Effects Transmitted Through Natural Media US Patent 685,955 Apparatus For Utilizing Effects Transmitted From A Distance To A Receiving Device Through Natural Media US Patent 685,956 Apparatus For Utilizing Effects Transmitted Through Natural Media US Patent 685,957 Apparatus For The Utilization of Radiant Energy US Patent 685,958 Method Of Utilizing of Radiant Energy US Patent 723,188 Method Of Signaling US Patent 725,605 System Of Signaling US Patent 787,412 Art Of Transmitting Electrical Energy Through The Natural Mediums US Patent 1,061,142 Fluid Propulsion US Patent 1,061,206 Turbine US Patent 1,113,716 Fountain US Patent 1,119,732 Apparatus For Transmitting Eleectrical Energy US Patent 1,209,359 Speed Indicator US Patent 1,266,175 Lightning Protector US Patent 1,274,816 Speed Indicator US Patent 1,314,718 Ship's Log US Patent 1,329,559 Valvular Conduit US Patent 1,365,547 Flow Meter US Patent 1,402,025 Frequency Meter US Patent 1,655,113 Method Of Aerial Transportation US Patent 1,655,114 Apparatus For Aerial Transportation British Patent 1,877 Improvements in Electric Lamps British Patent 2,801 Improvements in Reciprocating Engines and Means for Regulating the Period of the same British Patent 2,812 Improvements in Methods of and Apparatus for the Generation of Electric Currents of Defined Period British Patent 2,975 Improvements in Dynamo Electric Machines British Patent 6,481 Improvements relating to the Electrical Transmission of Power and to Apparatus therefor British Patent 6,502 Improvements relating to the Generation and Distribution of Electric Currents and to Apparatus therefor British Patent 6,527 Improvements relating to Electro-motors British Patent 8,200 Improvements relating to the Transmission of Electrical Energy British Patent 8,575 Improved Methods of and Apparatus for Generating and Utilizing Electric Energy for Lighting Purposes British Patent 11,293 Improvements relating to the Utilization of Electromagnetic, Light, or other like Radiations Effects or Disturbances transmitted through the Natural Media and to Apparatus therefor British Patent 11,473 Improvements in Alternating Current Electro-magnetic Motors British Patent 13,563 Improvements in, and relating to, the Transmission of Electrical Energy British Patent 14,550 Improvements relating to the Insulation of Electric Conductors British Patent 14,579 Improvements in and relating to the Transmission of Electrical Energy British Patent 16,709 Improvements relating to the Conversion of Alternating into Direct Electric Currents British Patent 19,420 Improvements in Alternating Current Electro-magnetic Motors British Patent 19,426 Improvements in the Construction and Mode of Operating Alternating Current Motors Canadian Patent 24,033 Improvements in Dynamo Electric Machines Canadian Patent 29,537 Improvements in Methods of and Apparatus for the Electrical Transmission of Power Canadian Patent 30,172 Improvements in Methods of and Apparatus for Converting and Distributing Electric Currents Canadian Patent 33,317 Improvements in Methods and Apparatus for Converting Alternating into Direct Currents Canadian Patent 135,174 Improvements in Fluid Propulsion (Tesla Pump) Canadian Patent 142,352 Improvement in the Art of Transmitting Electrical Energy Through the Natural Mediums
The US patent number is US 7198789 B2.
Tesla invented fluorescent lighting, the Tesla induction motor, the Tesla coil, and developed the alternating current (AC) electrical supply system that included a motor and transformer, and 3-phase electricity and the modern radio. US Patent 11,865 Method Of Insulating Electric Conductors US Patent 334,823 Commutator For Dynamo-Electric Machines US Patent 335,786 Electric-Arc Lamp US Patent 335,787 Electric-Arc Lamp US Patent 336,961 Regulator For Dynamo-Electric Machines US Patent 336,962 Regulator For Dynamo-Electric Machines US Patent 350,954 Regulator For Dynamo-Electric Machines US Patent 359,748 Dynamo-Electric Machine US Patent 381,968 Electro-Magnetic Motor US Patent 381,969 Electro-Magnetic Motor US Patent 381,970 System Of Electrical Distribution US Patent 382,279 Electro-Magnetic Motor US Patent 382,280 Electrical Transmission Of Power US Patent 382,281 Electrical Transmission Of Power US Patent 382,282 Method Of Converting And Distributing Electric Currents US Patent 382,845 Commutator For Dynamo-Electric Machines US Patent 390,413 System Of Electrical Distribution US Patent 390,414 Dynamo-Electric Machine US Patent 390,415 Dynamo-Electric Machine Or Motor US Patent 390,721 Dynamo-Electric Machine US Patent 390,820 Regulator For Alternate-Current Motors US Patent 396,121 Thermo-Magnetic Motor US Patent 401,520 Method Of Operating Electro-Magnetic Motors US Patent 405,858 Electro-Magnetic Motor US Patent 405,859 Method Of Electrical Power Transmission US Patent 406,968 Dynamo-Electric Machine US Patent 413,353 Method Of Obtaining Direct From Alternating Currents US Patent 416,191 Electro-Magnetic Motor US Patent 416,192 Method Of Operating Electro-Magnetic Motors US Patent 416,193 Electro-Magnetic Motor US Patent 416,194 Electric Motor US Patent 416,195 Electro-Magnetic Motor US Patent 417,794 Armature For Electric Machines US Patent 418,248 Electro-Magnetic Motor US Patent 424,036 Electro-Magnetic Motor US Patent 428,057 Pyromagneto-Electric Generator US Patent 433,700 Alternating-Current Electro-Magnetic Motor US Patent 433,701 Alternating-Current Motor US Patent 433,702 Electrical Transformer Or Induction Device US Patent 433,703 Electro-Magnetic Motor US Patent 445,207 Electro-Magnetic Motor US Patent 447,920 Method Of Operating Arc-Lamps US Patent 447,921 Alternating Electric Current Generator US Patent 454,622 System Of Electric Lighting US Patent 455,067 Electro-Magnetic Motor US Patent 455,068 Electrical Meter US Patent 455,069 Electric Incandescent Lamp US Patent 459,772 Electro-Magnetic Motor US Patent 462,418 Method Of And Apparatus For Electrical Conversion And Distribution US Patent 464,666 Electro-Magnetic Motor US Patent 464,667 Electrical Condenser US Patent 487,796 System Of Electrical Transmission Of Power US Patent 511,559 Electrical Transmission Of Power US Patent 511,560 System Of Electrical Power Transmission US Patent 511,915 Electrical Transmission Of Power US Patent 511,916 Electric Generator US Patent 512,340 Coil For Electro-Magnets US Patent 514,167 Electrical Conductor US Patent 514,168 Means For Generating Electric Currents US Patent 514,169 Reciprocating Engine US Patent 514,170 Incandescent Electric Light US Patent 514,972 Electric Railway System US Patent 514,973 Electrical Meter US Patent 517,900 Steam Engine US Patent 524,426 Electromagnetic Motor US Patent 555,190 Alternating Motor US Patent 567,818 Electrical Condenser US Patent 568,176 Apparatus For Producing Electric Currents Of High Frequency And Potential US Patent 568,177 Apparatus For Producing Ozone US Patent 568,178 Method Of Regulating Apparatus For Producing Electric Currents Of High Frequency US Patent 568,179 Method Of And Apparatus For Producing Currents Of High Frequency US Patent 568,180 Apparatus For Producing Electrical Currents Of High Frequency US Patent 577,670 Apparatus For Producing Electric Currents Of High Frequency US Patent 577,671 Manufacture Of Electrical Condensors, Coils And Similar Devices US Patent 583,953 Apparatus For Producing Currents Of High Frequency US Patent 593,138 Electrical Transformer US Patent 609,245 Electrical Circuit Controller US Patent 609,246 Electric Circuit Controller US Patent 609,247 Electric Circuit Controller US Patent 609,248 Electric Circuit Controller US Patent 609,249 Electric Circuit Controller US Patent 609,250 Electrical Igniter For Gas Engines US Patent 609,251 Electric Circuit Controller US Patent 611,719 Electrical Circuit Controller US Patent 613,735 Electric Circuit Controller US Patent 613,809 Method Of And Apparatus For Controlling Mechanism Of Moving Vessels Or Vehicles US Patent 645,576 System Of Transmission Of Electrical Energy US Patent 649,621 Apparatus For Transmission Of Electrical Energy US Patent 655,838 Method Of Insulating Electric Conductors US Patent 685,012 Means For Increasing The Intensity Of Electrical Oscillations US Patent 685,953 Method Of Intensifying And Utilizing Effects Transmitted Through Natural Media US Patent 685,954 Method Of Utilizing Effects Transmitted Through Natural Media US Patent 685,955 Apparatus For Utilizing Effects Transmitted From A Distance To A Receiving Device Through Natural Media US Patent 685,956 Apparatus For Utilizing Effects Transmitted Through Natural Media US Patent 685,957 Apparatus For The Utilization of Radiant Energy US Patent 685,958 Method Of Utilizing of Radiant Energy US Patent 723,188 Method Of Signaling US Patent 725,605 System Of Signaling US Patent 787,412 Art Of Transmitting Electrical Energy Through The Natural Mediums US Patent 1,061,142 Fluid Propulsion US Patent 1,061,206 Turbine US Patent 1,113,716 Fountain US Patent 1,119,732 Apparatus For Transmitting Eleectrical Energy US Patent 1,209,359 Speed Indicator US Patent 1,266,175 Lightning Protector US Patent 1,274,816 Speed Indicator US Patent 1,314,718 Ship's Log US Patent 1,329,559 Valvular Conduit US Patent 1,365,547 Flow Meter US Patent 1,402,025 Frequency Meter US Patent 1,655,113 Method Of Aerial Transportation US Patent 1,655,114 Apparatus For Aerial Transportation British Patent 1,877 Improvements in Electric Lamps British Patent 2,801 Improvements in Reciprocating Engines and Means for Regulating the Period of the same British Patent 2,812 Improvements in Methods of and Apparatus for the Generation of Electric Currents of Defined Period British Patent 2,975 Improvements in Dynamo Electric Machines British Patent 6,481 Improvements relating to the Electrical Transmission of Power and to Apparatus therefor British Patent 6,502 Improvements relating to the Generation and Distribution of Electric Currents and to Apparatus therefor British Patent 6,527 Improvements relating to Electro-motors British Patent 8,200 Improvements relating to the Transmission of Electrical Energy British Patent 8,575 Improved Methods of and Apparatus for Generating and Utilizing Electric Energy for Lighting Purposes British Patent 11,293 Improvements relating to the Utilization of Electromagnetic, Light, or other like Radiations Effects or Disturbances transmitted through the Natural Media and to Apparatus therefor British Patent 11,473 Improvements in Alternating Current Electro-magnetic Motors British Patent 13,563 Improvements in, and relating to, the Transmission of Electrical Energy British Patent 14,550 Improvements relating to the Insulation of Electric Conductors British Patent 14,579 Improvements in and relating to the Transmission of Electrical Energy British Patent 16,709 Improvements relating to the Conversion of Alternating into Direct Electric Currents British Patent 19,420 Improvements in Alternating Current Electro-magnetic Motors British Patent 19,426 Improvements in the Construction and Mode of Operating Alternating Current Motors Canadian Patent 24,033 Improvements in Dynamo Electric Machines Canadian Patent 29,537 Improvements in Methods of and Apparatus for the Electrical Transmission of Power Canadian Patent 30,172 Improvements in Methods of and Apparatus for Converting and Distributing Electric Currents Canadian Patent 33,317 Improvements in Methods and Apparatus for Converting Alternating into Direct Currents Canadian Patent 135,174 Improvements in Fluid Propulsion (Tesla Pump) Canadian Patent 142,352 Improvement in the Art of Transmitting Electrical Energy Through the Natural Mediums