Nomograph

Details Nomograph Nomograph

1983-07-12

1986-06-03

Zarfas, Louis S.

Printing and office machinery

Typewriter or calculator

Calculator

Patent

active

D02840880

REFERENCES:
patent: 1074439 (1913-09-01), Kincaid
patent: 1637222 (1927-07-01), Hempleman
patent: 3372869 (1968-03-01), Motte et al.

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