United States Patent 3127188
US Patent References:
Carriage truck
- - 2319008

Endless track supported invalid chair
- - 2751027


Publication Date:
03/31/1964
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Primary Class:
280/5.220
Other Classes:
280/210, 280/11, 280/DIG.010
International Classes:
A61G5/06; B62B9/02; B62D55/075; A61G5/00; B62B9/00; B62D55/00
Foreign References:
FR519508A
FR980237A