Apparatus for calculating time periods

Details Apparatus for calculating time periods Apparatus for calculating time periods

2005-05-03

2005-05-03

Frech, Karl D. (Department: 2876)

Registers

Calculators

Tabular

C235S0880RC, C235S0880RC

Reexamination Certificate

active

06886740

ABSTRACT:
A single axis rotatable disc calendar for calculating time periods and future dates based on current or past events is disclosed. In particular, calculators for determining fertility timing, testing and treatment dates have a base circular calendar (61) and one or more discs (58, 59, 60) containing information about menstrual cycles and ovulation events. The base circular calendar has 365 divisions (67) for the days in the year or 153 divisions for a shortened calendar excluding February. A separate February calendar with a leap February month is provided on the back of the base.

REFERENCES:
patent: 3771716 (1973-11-01), Sanchez
patent: 4041628 (1977-08-01), Sasson
patent: 4092521 (1978-05-01), Weisshaar
patent: 4308678 (1982-01-01), Slobin
patent: 4625099 (1986-11-01), Freedom
patent: 4751373 (1988-06-01), Ivey
patent: 5310994 (1994-05-01), Thabet et al.
patent: 5496070 (1996-03-01), Thompson
patent: 5837197 (1998-11-01), Porrazzo et al.

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