Calculator with perpetual calendar

Details Calculator with perpetual calendar Calculator with perpetual calendar

2000-05-19

2000-11-21

Holtje, Martie K.

Office supplies; artists and teachers materials

Calendar or calendar holder

Combined

D18 2, D19 25, D10 2, D10 3, D10 15, D10 18, 1903

Patent

active

D04340701

REFERENCES:
patent: D147742 (1947-10-01), Bowers
patent: D163586 (1951-06-01), Dingeldein
patent: D274798 (1984-07-01), O'Hara et al.
patent: D292710 (1987-11-01), Woods
patent: D352664 (1994-11-01), Peersmann
patent: D363881 (1995-11-01), Yung
patent: D366621 (1996-01-01), George et al.
patent: D427629 (2000-07-01), Chu et al.
patent: D427630 (2000-07-01), Chu et al.
patent: 3827168 (1974-08-01), Mori
patent: 5480118 (1996-01-01), Cross

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