Title:
Stairclimbing wheelchair
United States Patent 3178193


Inventors:
Grogan, George D.
Application Number:
US23920762A
Publication Date:
04/13/1965
Filing Date:
11/21/1962
Assignee:
Grogan, George D.
Primary Class:
Other Classes:
280/5.22, 280/11, 280/DIG.10, 301/45
International Classes:
A61G5/06
View Patent Images:
US Patent References:
2765199Anti-skid wheel assembly1956-10-02
2742973Powered invalid chair and handle control therefor1956-04-24
2214311Truck1940-09-10
Foreign References:
AT78898B1919-10-25
GB584886A1947-01-24