United States Patent 2587687
Inventors:
Beyers, Fred C.
Publication Date:
03/04/1952
Assignee:
Beyers, Fred C.
Other Classes:
124/44.700, 124/37, 124/29, 89/41.010
International Classes:
F41B11/14; F41B11/00
Foreign References:
| GB185401181A | | | | |
| GB191504078A | | | | |
| FR419936A | | | | |