Transportation – Perambulator – invalid chair – or stretcher
Patent
1990-02-23
1992-04-07
Chin, Kay H.
Transportation
Perambulator, invalid chair, or stretcher
D12133, D24183
Patent
active
D03251853
REFERENCES:
patent: 3271796 (1966-09-01), Dillman
patent: 3797051 (1974-03-01), Evans
patent: 4012799 (1977-03-01), Rutherford
patent: 4033000 (1977-07-01), Bonifay
patent: 4067079 (1978-01-01), Buchman
patent: 4283068 (1981-08-01), Keyser
patent: 4783862 (1988-11-01), Murphy
patent: 4793008 (1988-12-01), Johansson
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