If it is a U.S. patent, you can go to the USPTO website for patent searches and enter the number in "patent number search".
Patent pending is a warning that a patent application has been filed. It is completely worthless until and unless a patent is actually issued for that invention. Patent number notice means a patent with that number was issued for the invention that is implemented in the product labeled with that number.
the patent number is 5209584
There is no specific patent number for the mailbox.
The US patent number is US 7198789 B2.
You communicate with the Patent Office.
There is no US patent 555408021. There is also no US patent 55408021.
The phone number of the Holland Patent Free Library is: 315-865-5034.
The Frisbee patent was issued on September 30, 1958 as Design Patent number D183,626.
If it is a U.S. patent, you can go to the USPTO website for patent searches and enter the number in "patent number search". You can obtain the online image of nearly any US patent ever issued (using TIFF format). If you do not know the patent number, you may have to go elsewhere for more information, as the USPTO database prior to 1976 cannot be searched by anything other than the patent number. http://www.uspto.gov/patft/index.html
4,151,678
Rillieux received patent number 3237 for his improvement to sugar processing in 1843.