Title:
APPARATUS FOR CALCULATING TIME PERIODS AND FUTURE DATES
Document Type and Number:
WIPO Patent Application WO2000077590
Kind Code:
A9
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.
Inventors:
CRAIG H RANDALL (US)
Application Number:
PCT/US1999/027771
Publication Date:
April 14, 2005
Filing Date:
November 22, 1999
Export Citation:
Assignee:
CRAIG H RANDALL (US)
International Classes:
G06C3/00; (IPC1-7): G06C27/00
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