Writing aid

Details Writing aid Writing aid

1990-12-27

1992-08-18

Holtje, Nelson C.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Element or attachment

D19 81, D19 84, D19 65

Patent

active

D03287599

REFERENCES:
patent: 105001 (1870-07-01), Sanborn
patent: D292104 (1987-09-01), Keller, Jr.
patent: D298439 (1988-11-01), Rusk
patent: D318295 (1991-07-01), Sze
patent: 1395793 (1921-11-01), Broschart
patent: 2173451 (1939-09-01), Lorber
patent: 4076427 (1978-02-01), Anderson
patent: 4526547 (1985-07-01), Rusk
patent: 4689020 (1987-08-01), Rusk

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