Picture plane grid viewer

Details Picture plane grid viewer Picture plane grid viewer

1979-05-24

1982-03-23

Word, George P.

Office supplies; artists and teachers materials

Equipment for writing, drawing, or for fine arts

D19 37, D1906

Patent

active

D02634813

REFERENCES:
patent: 1282382 (1918-10-01), Cross
patent: 1821252 (1931-09-01), Woods
patent: 2487690 (1949-11-01), Black et al.
patent: 3660903 (1972-05-01), Caperton
patent: 3939564 (1976-02-01), Slawinski
patent: 4001941 (1977-01-01), Cruz
American Artist, vol. 43, Iss. 440, 3/79, p. 24 bottom left.

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