United States Patent 3099024
Inventors:
Lewis, Arnold S.
Publication Date:
07/30/1963
Assignee:
Lewis, Arnold S.
International Classes:
B63B7/08; B63B7/00
Foreign References:
| GB191203214A | | | | |
| CH126709A | | | | |
| FR809918A | | | | |
| GB529113A | | | | |
| FR1115167A | | | | |
| DE1010855B | | | | |
| DE1039871B | | | | |