United States Patent 2793902
Inventors:
Govan Jr., Clifton D.
Publication Date:
05/28/1957
Assignee:
Govan Jr., Clifton D.
Other Classes:
403/349, 403/166, 403/321
International Classes:
A01B1/22; A01B1/00
US Patent References:
| 2535816 | Coupling for pipes and other tubular elements | | | |
| 2565466 | Knockdown shovel | | | |
Foreign References:
| FR437239A | | | | |
| FR928506A | | | | |
| GB189514080A | | | | |
| GB270167A | | | | |
| IT457519B | | | | |
| IT472607B | | | | |