Title:
PERFORMANCE DISPLAY APPARATUS
United States Patent 3454942
Inventors:
Chamberlin Jr., Henry S.
Graves Jr., Roger E.
Kelley, Joseph P.
Publication Date:
07/08/1969
Assignee:
BIO DYNAMICS INC
Other Classes:
40/472, 73/488, 482/900, 482/63, 73/379.070
International Classes:
A61B5/22; A63B24/00; G08B5/22; A63B21/00; G08B23/00