United States Patent 2974956
Inventors:
Zuber, Alfred G.
Publication Date:
03/14/1961
Assignee:
Zuber, Alfred G.
Other Classes:
124/17, 446/431
International Classes:
A63H33/02; A63H33/00
US Patent References:
| 2603204 | N/A | | | |
| 1270378 | N/A | | | |
| 1243334 | N/A | | | |
| 1163609 | N/A | | | |