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
Foreign Patent Documents
Other references
D149083 | March 1948 | Mooney |
1144487 | June 1915 | McGinley |
2708797 | May 1955 | Hamer |
3473249 | October 1969 | Ankrum |
3806398 | April 1974 | Lasser |
327278 | July 1935 | ITX |
3036 | April 1885 | GBX |
- 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
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
Classifications