Keycard with indexing channels

Details Keycard with indexing channels Keycard with indexing channels

1984-10-29

1989-03-07

Zarfas, Louis S.

Office supplies; artists and teachers materials

Paper or pasteboard for writing or printing

Patent

active

D03001482

REFERENCES:
patent: D285938 (1986-09-01), Ventres, Jr.
patent: 4286641 (1981-09-01), Watson
patent: 4602447 (1986-07-01), Feingold

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