Undertaking
Patent
1988-05-13
1989-07-25
Crow, S. R.
Undertaking
272 17, 272 1B, 272 97, A63B 708, A63B 6918, A63G 3100
Patent
active
048505889
ABSTRACT:
A balancing apparatus having a surf board, an upstanding support post and a main universal joint connected in-between the bottom of the surf board and the top of the support post. The surf board can be tilted relatively to the support post about two different axes passing through the center of the support post.
REFERENCES:
patent: 1789680 (1931-01-01), Gwinnett
patent: 2212460 (1940-08-01), Stephenson
patent: 2524238 (1950-10-01), Soule
patent: 2661954 (1953-12-01), Koci
patent: 4509743 (1985-04-01), Lie
patent: 4749180 (1988-06-01), Boomer
Desjardins Gilles
Tremblay Guy
Valois Paul-Yvon
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