Ergonomic pen

Details Ergonomic pen Ergonomic pen

1994-02-02

1995-06-20

Thompson, Martie

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

Marking instrument

D19 55, D19 41

Patent

active

D03595080

REFERENCES:
patent: D228418 (1973-09-01), Locke
patent: D248028 (1978-05-01), Huffman
patent: D256925 (1980-09-01), Postrehovsky-Axel
patent: D292104 (1987-09-01), Keller, Jr.
patent: D313624 (1991-01-01), Ferjan
patent: 836652 (1906-11-01), Rosdahl

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