Adjustable unit circle board for evaluating trigonometric functi

Details Adjustable unit circle board for evaluating trigonometric functi Adjustable unit circle board for evaluating trigonometric functi

1997-07-28

1999-05-04

Davis, Antoine Duval

Measuring, testing, or signalling instruments

Measuring, regulating or indicating instrument, or casing

Geometric

1004

Patent

active

D04090985

REFERENCES:
patent: D342685 (1993-12-01), Stokes
patent: 3386190 (1968-06-01), Savin et al.
patent: 5114347 (1992-05-01), Camp

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