Balancing and exercising device
United States Patent 3269746
US Patent References:
Roller skate
- - 1600075

Caster
- - 2332089

Exerciser
- - 2351293

Roller board device
- - 2764411

Roller board device
- - 2829891


Inventors:
Jonker, Ruth A.
Publication Date:
08/30/1966
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Assignee:
Jonker, Ruth A.
Primary Class:
280/87.041
Other Classes:
16/18R, D21/688, 16/18A, 482/146
International Classes:
A63B22/18; A63B22/00
US Patent References:
3024021Amusement and exercising toy
3107926Self-propelled amusement device
Foreign References:
DE842462C