Transportation – Perambulator – invalid chair – or stretcher – Walker
Patent
1997-09-29
1999-02-09
Spear, Robert M.
Transportation
Perambulator, invalid chair, or stretcher
Walker
1215
Patent
active
D04053958
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patent: D177233 (1956-03-01), Hawkinson
patent: D250405 (1978-11-01), Nyblom
patent: D336269 (1993-06-01), Hinrichsen et al.
patent: D371097 (1996-06-01), Fukushima
patent: D384622 (1997-10-01), Scheuren et al.
patent: 5456301 (1995-10-01), Wise
Michelin XHD1 Tire, 1996 Tread Design Guide, p. 179, Feb. 1996.
Ohio Machine Michelin H Neutral Off the Road Tire, 1996 Tread Design Guide, p. 241, Feb. 1996.
Ando Shuji
Honbo Yoichi
Bridgestone Corporation
Spear Robert M.
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