Perpetual calendar

Description

FIG. 1 is a top perspective view of a perpetual calendar showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof the undisclosed rear being a mirror image;

FIG. 4 is an end elevational view thereof the undisclosed end being a mirror image;

FIG. 5 is a top perspective view of a second embodiment of FIG. 1;

FIG. 6 is a top plan view thereof;

FIG. 7 is a front elevational view thereof; and

FIG. 8 is a side elevational view thereof, the undisclosed side being a mirror image.

Referenced Cited
U.S. Patent Documents
D149083 March 1948 Mooney
1144487 June 1915 McGinley
2708797 May 1955 Hamer
3473249 October 1969 Ankrum
3806398 April 1974 Lasser
Foreign Patent Documents
327278 July 1935 ITX
3036 April 1885 GBX
Other references
  • Toys That Teach, 1971, p. 8, "Single-Arched Abacus" on bottom left of page.
Patent History
Patent number: D324698
Type: Grant
Filed: Mar 1, 1990
Date of Patent: Mar 17, 1992
Inventor: Deborah S. Bruns (Kansas City, MO)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Pam Schmidt
Application Number: 7/486,739