Portable magnifier for video screen of hand held computer

Details Portable magnifier for video screen of hand held computer Portable magnifier for video screen of hand held computer

1991-01-08

1993-03-23

Word, A. Hugo

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

Patent

active

D03342077

REFERENCES:
patent: D256589 (1980-08-01), Iwashita
patent: D278348 (1985-04-01), Horgan
patent: D298250 (1988-10-01), Kildall
patent: D303977 (1989-10-01), Steel et al.
patent: 861153 (1907-07-01), Yergason
patent: 1702317 (1929-02-01), Rose
patent: 2083670 (1937-06-01), Schubert
patent: 2943409 (1960-07-01), Maiershofer
patent: 3076276 (1963-02-01), Pitchford
patent: 3178842 (1965-04-01), Zimmerman

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