United States Patent 1804441
Inventors:
Silva, Antone J.
Publication Date:
05/12/1931
Assignee:
Silva, Antone J.
Other Classes:
482/144, 482/907, 606/241
International Classes:
A61H1/02; A63B21/06; A63B21/00; A63B23/035; A61H1/02; A63B21/06; A63B21/00; A63B23/035