Undertaking
Patent
1989-09-14
1990-06-05
Crow, Stephen R.
Undertaking
272134, 272144, A63B 2100
Patent
active
049307711
ABSTRACT:
A twist board exercising device is provided which permits the exercising person to be seated upon a stool within a framework of adjustable height. Opposed arm rests and associated hand grips enable the person to limit the amount of twisting movement. A backrest portion, joined to the framework, is adjustably positionable with respect to elevation and angle of inclination.
REFERENCES:
patent: 4673180 (1987-06-01), Rice
patent: 4789152 (1988-12-01), Guerra
patent: 4836530 (1989-06-01), Stanley
Crow Stephen R.
Rainer Norman B.
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