United States Patent 2600757
Inventors:
Sylvester, Grimston Francis Bri
Publication Date:
06/17/1952
Assignee:
Sylvester, Grimston Francis Bri
International Classes:
B63B7/06; B63B7/00
Foreign References:
| GB215152A | | | | |
| GB385538A | | | | |
| GB409195A | | | | |
| GB504892A | | | | |
| DE468695C | | | | |