Title:
Stairclimbing wheelchair
United States Patent 3133742
US Patent References:
/0756767.html
- - 0756767
Propelling mechanism
- - 1617261
Tightener for folding wheel chair
- - 2818910
Wheel chair width control
- - 2824597
Adjustable motor-driven invalid chair with endless tracks
- - 3068950
/0756767.html
- - 0756767
Propelling mechanism
- - 1617261
Tightener for folding wheel chair
- - 2818910
Wheel chair width control
- - 2824597
Adjustable motor-driven invalid chair with endless tracks
- - 3068950
Inventors:
Richison, Eugene M.
Richison, Ethel M.
Richison, Ethel M.
Publication Date:
05/19/1964
View Patent Images:
Export Citation:
Assignee:
Conklin T. H.
Primary Class:
Other Classes:
297/45, 280/211, 280/11, 280/DIG.010
International Classes:
A61G5/06; A61G5/10; A61G5/00
US Patent References:
| 3111331 | Stair-climbing wheel chair |
Foreign References:
| GB191509240A | ||||
| GB693983A | ||||
| DE325764C | ||||
| DE808411C |