TRAINING DEVICES
United States Patent 3457783
US Patent References:
Wind course indicating means
- - 2363087

Differential gear
- - 2364411

Wind indicator sailing aid
- - 3371529


Inventors:
Waddington, Rogor Strange
Duval, Bruce
Publication Date:
07/29/1969
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Assignee:
T P I LTD
Primary Class:
73/170.030
Other Classes:
475/9, 475/2, 434/60
International Classes:
G09B9/06; G09B9/02; F16H1/40; G01W1/00




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