Title:
Stair climbing chair
United States Patent 3226128
US Patent References:
Traction device
- - 2504511

Stairclimbing wheelchair
- - 3133742

Stair climbing wheelchair
- - 3142351


Inventors:
Grier Jr., Robert C.
Publication Date:
12/28/1965
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Assignee:
Grier Jr., Robert C.
Primary Class:
280/5.200
Other Classes:
301/47, 280/11, 280/5.260, 280/DIG.010
International Classes:
A61G5/06; A61G5/00
Foreign References:
DE187291C