United States Patent 3501774
Inventors:
Norman, George R.
Publication Date:
03/24/1970
Assignee:
George, Norman R.
Other Classes:
24/306, 2/240
International Classes:
A41F11/16; A41F11/00; A41F11/02; A41F9/02
Foreign References:
| GB428447A | | | | |
| NL6405818A | | | | |
| IT578067B | | | | |