Transportation – Perambulator – invalid chair – or stretcher – Walker
Patent
1998-10-15
2000-05-23
Spear, Robert M.
Transportation
Perambulator, invalid chair, or stretcher
Walker
1215
Patent
active
D04254562
REFERENCES:
patent: D275384 (1984-09-01), Fontaine et al.
patent: D344697 (1994-03-01), Christie
patent: 5203933 (1993-04-01), Nagahisa
Kumho Grip Max Tire, 1997 Tread Design Guide, p. 45.
Galaxy Implement Tire, 1997 Tread Design Guide, p. 194.
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