ISOMETRIC EXERCISER HAVING INITIALLY-OPERATIVE RESILIENT RESISTANCE
United States Patent 3498609
US Patent References:
Exercising device
- - 2529347

Combination exerciser and strength testing device
- - 3349621


Inventors:
Lukens, David R.
Publication Date:
03/03/1970
View Patent Images:
Assignee:
David, Lukens R.
Primary Class:
Other Classes:
73/379.080, 482/125
International Classes:
A63B21/055; A63B21/02; G01L5/06; A63B21/00; A63B21/02




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