United States Patent 3125351
US Patent References:
/RE24272.html
- - RE24272

Exercising apparatus
- - 1412691

Roller for moving heavy objects
- - 2541928

Roller board device
- - 2764411

Resilient cradle for boat trailers
- - 3039629


Publication Date:
03/17/1964
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Primary Class:
280/47.331
Other Classes:
305/60, 280/3
International Classes:
B63C3/12; B65G7/04; B63C3/00; B65G7/00