Hand exerciser

Details Hand exerciser Hand exerciser

1991-03-06

1991-10-29

Bahr, Robert

Undertaking

272117, 272DIG4, A63B 2100

Patent

active

050609343

ABSTRACT:
A hand exerciser with grip handles which in use are alternately squeezed and released against the urgency of a spring, in which the spring in use is replaceable with another spring of different resistance, to thereby correspondingly vary the resistance of the exercise routine.

REFERENCES:
patent: 1026215 (1912-05-01), Korth
patent: 4433364 (1984-02-01), Noble
patent: 4538806 (1985-09-01), Wilkerson
patent: 4632384 (1986-12-01), Bright
patent: 4756522 (1988-07-01), Sandoval
patent: 4775148 (1988-10-01), McLaughlin
patent: 4778173 (1988-10-01), Joutras
patent: 4801137 (1989-01-01), Douglass
patent: 4830361 (1989-05-01), Hoffman
patent: 4909506 (1990-03-01), Smith

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