Ratchet powered wheelchair

Details Ratchet powered wheelchair Ratchet powered wheelchair

1990-10-04

1992-10-13

Chin, Kay H.

Transportation

Perambulator, invalid chair, or stretcher

Wheelchair

D12128

Patent

active

D03301770

REFERENCES:
patent: 3666292 (1972-05-01), Bartos
patent: 3994509 (1976-11-01), Schaeffer
patent: 4705284 (1987-11-01), Stout
patent: 4762332 (1988-08-01), Seol
patent: 4811964 (1989-03-01), Horn
patent: 5007655 (1991-04-01), Hanna
patent: 5020815 (1991-06-01), Harris et al.

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