Multiple image, frontal viewing aid

Details Multiple image, frontal viewing aid Multiple image, frontal viewing aid

1998-01-26

1999-03-09

Mortimer, Paula A.

Photography and optical equipment

Optical article not elsewhere specified

Lens or objective

D16137, 1606

Patent

active

D04065980

REFERENCES:
patent: D145638 (1946-09-01), Rosenberg
patent: D173045 (1954-09-01), Smart
patent: D285699 (1986-09-01), Leopoldi
patent: 2375634 (1945-05-01), Dunning
patent: 2453064 (1948-11-01), Cressaty
patent: 3535025 (1970-10-01), Shannon
patent: 4099851 (1978-07-01), Rethope
patent: 5523889 (1996-06-01), Bewsher

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