09-21-2023, 05:35 PM
The Howard Johnson Motor
United States Patent 4151431
filed December 6, 1973
This was the first patent I seen that was granted for this type of device
shown to me in 1993
it is easy to look up for yourself, if you like
Tom
It turn out there are only 2 patents granted both
Howard Johnson
second on March 28, 1995
patent no. 5402021
End of my search
Tom
United States Patent 4151431
filed December 6, 1973
This was the first patent I seen that was granted for this type of device
shown to me in 1993
it is easy to look up for yourself, if you like
Tom
It turn out there are only 2 patents granted both
Howard Johnson
second on March 28, 1995
patent no. 5402021
End of my search
Tom
