Menstrual cycle calculator

Details Menstrual cycle calculator Menstrual cycle calculator

1975-05-09

1976-06-22

Jackmon, Edith Simmons

Registers

Calculators

Tabular

58 4M, G06C 300, G04B 1924

Patent

active

039646742

ABSTRACT:
A menstrual calculator to determine the fertile dates of a period composed of a base panel and dials and a pointer which bear date indicia and are rotatable independently about a common dial pin.

REFERENCES:
patent: 3278118 (1966-10-01), Klein, Jr.
patent: 3534905 (1970-10-01), Kull

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