United States Patent 3139306
Inventors:
Jennings, Gerald M.
Gooding, Jack D.
Publication Date:
06/30/1964
Assignee:
EVEREST & JENNINGS
Other Classes:
297/423.100, 297/DIG.004
International Classes:
A61G3/06; A61G5/00; A61G5/10; A61G5/12; A61G5/14; A61G3/00