Seat belts were invented in the 19th century by the English engineer George Cayley, but were not required to be installed in new cars in the US before 1959.
Not if they did not come from the factory with seat belts. If they came form the factory with seat belts you are required to wear them.
In the year 1949 seat belts became an option in cars.
Seat belts were invented early in the 1880s, but were not patented (by a different person than the inventor) until late in the 1880s.
In the US seat belts began to show up in the later 1950's.
with rubber
Yes
no
1966
It is probable that no one knows this answer. Auto seat belts came into use well after seat belts had been in common usage in aircraft for decades and decades!
See History of seat belts
It was the first modern seat belt that was put in cars by Volvo in 1959-1960