Double viewer cartridge

Details Double viewer cartridge Double viewer cartridge

1978-09-22

1981-01-06

Feldman, Peter

Recording, communication, or information retrieval equipment

Computer, data processor equipment

242 712, D1401

Patent

active

D02577704

REFERENCES:
patent: D221999 (1971-09-01), Steinberg et al.
patent: 3425531 (1969-02-01), Fuld
patent: 3537780 (1970-11-01), Angenieux

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