Title:
Spring counterbalance
Document Type and Number:
United States Patent 2168209
Inventors:
Haupt, Walter H.
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Publication Date:
08/01/1939
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Referenced by:
Export Citation:
Assignee:
KELLEY KOETT MFG COMPANY INC
Primary Class:
Other Classes:
378/197, 248/669, 74/592, 248/676
International Classes:
A61B6/00; F16M11/04; F16M11/24; F16M11/02; F16M11/20