United States Patent 2533685
Inventors:
Ignatius, Nurkiewicz
Publication Date:
12/12/1950
Other Classes:
239/309, 222/400.700, 141/19, 222/399, 239/303, 169/88
International Classes:
A62C13/74; A62C13/00
Foreign References:
| GB237405A | | | | |
| FR605078A | | | | |
| GB363235A | | | | |