Abacus

Details Abacus Abacus

2006-01-24

2006-01-24

Veynar, Caron D. (Department: 2913)

Printing and office machinery

Typewriter or calculator

Calculator

CD19S059000, C434S203000

Design Patent

active

D0513762

CLAIM:
The ornamental design for an abacus, as shown and described.

REFERENCES:
patent: 604963 (1898-05-01), Breinl
patent: 637964 (1899-11-01), Johnsen
patent: 2655737 (1953-10-01), Don Dero
patent: D184042 (1958-12-01), Dochterman et al.
patent: D198847 (1964-08-01), Mathison
patent: D413472 (1999-09-01), Dagan
patent: 2003/0148250 (2003-08-01), Walker et al.

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