Calculator with perpetual calendar

Details Calculator with perpetual calendar Calculator with perpetual calendar

2000-05-18

2001-02-06

Holtje, Martie K. (Department: 2913)

Office supplies; artists and teachers materials

Calendar or calendar holder

Combined

CD19S025000, CD10S002000, CD10S003000, CD10S015000, CD10S018000, CD18S002000

Design Patent

active

D0437351

CLAIM:
The ornamental design for a calculator with perpetual calendar, as shown and described.

REFERENCES:
patent: D. 147742 (1947-10-01), Bowers
patent: D. 163586 (1951-06-01), Dingeldein
patent: D. 274798 (1984-07-01), O'Hara et al.
patent: D. 292710 (1987-11-01), Woods
patent: D. 352664 (1994-11-01), Peersmann
patent: D. 363881 (1995-11-01), Yung
patent: D. 366621 (1996-01-01), George et al.
patent: D. 427629 (2000-07-01), Chu et al.
patent: D. 427630 (2000-07-01), Chu et al.
patent: 3827168 (1974-08-01), Mori
patent: 5480118 (1996-01-01), Cross

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