United States Patent 2910737
Inventors:
Macmillan, James C. A.
Publication Date:
11/03/1959
Assignee:
Macmillan, James C. A.
Other Classes:
446/106, D25/19, D30/112
International Classes:
A63H33/08; A63H33/10; A63H33/04
Foreign References:
| GB111763A | | | | |
| DE812534C | | | | |
| IT459123B | | | | |