United States Patent 3140877
Inventors:
Spademan, Richard G.
Publication Date:
07/14/1964
Assignee:
Spademan, Richard G.
International Classes:
A63C9/08; A63C9/084; A63C9/085; A63C9/086
Foreign References:
| NO19021A | | | | |
| DE289361C | | | | |
| DE569828C | | | | |
| SE44432A | | | | |
| SE89860A | | | | |
| IT350596B | | | | |