Adjustable motor-driven invalid chair with endless tracks
United States Patent 3068950
US Patent References:
Tractor
- - 1336961
Motor-driven invalid's chair
- - 2592023
Endless track supported invalid chair
- - 2751027
Selective wheeled or endless belt supports for self-propelled vehicles
- - 2765860
Lift conveyor
- - 3020059
Tractor
- - 1336961
Motor-driven invalid's chair
- - 2592023
Endless track supported invalid chair
- - 2751027
Selective wheeled or endless belt supports for self-propelled vehicles
- - 2765860
Lift conveyor
- - 3020059
Inventors:
Davidson, Isaac F.
Publication Date:
12/18/1962
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Export Citation:
Assignee:
Davidson, Isaac F.
Primary Class:
Other Classes:
280/639, 180/6.700, 280/5.220, 280/11, 180/907, 180/6.500, 280/DIG.010
International Classes:
A61G5/06; B62B9/02; B62D55/075; A61G5/00; B62B9/00; B62D55/00