United States Patent 3106397
Inventors:
Lacey, Frederick S.
Publication Date:
10/08/1963
Assignee:
Lacey, Frederick S.
Other Classes:
446/486, 446/437, 446/409, 473/595
International Classes:
A63B43/04; A63B43/00
Foreign References:
| GB126863A | | | | |
| DE502307C | | | | |
| FR1184170A | | | | |