Trigonometric slide rule

Details Trigonometric slide rule Trigonometric slide rule

1989-09-22

1992-01-28

Brown, Brian W.

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Calculators

Bar

235 89R, G06G 102

Patent

active

050846094

ABSTRACT:
The invention relates to an improved slide rule type of apparatus that provides visual solutions to trigonometric problems. The invention provides a cheaper to make and easier to read trigonometric slide rule.

REFERENCES:
patent: 3082948 (1953-03-01), Simini
patent: 3130905 (1964-04-01), Hsiao
patent: 3372869 (1968-03-01), Motte et al.
patent: 3473731 (1969-10-01), Kurland
patent: 3563456 (1971-02-01), Hendricks
patent: 4476380 (1984-10-01), Sampson

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