1941
2,232,393
2,238,150
2,239,046
2,250,150
2,256,770
2,259,337
2,260,689
1942
1943
2,324,477
I am not certain that the device shown was manufactured under this patent but the function is identical.
2,232,393
2,238,150
2,239,046
2,250,150
2,256,770
2,259,337
2,260,689
2,324,477
I am not certain that the device shown was manufactured under this patent but the function is identical.