Periscope

Details Periscope Periscope

1995-12-28

1996-10-22

Gandy, James M.

Photography and optical equipment

Optical article not elsewhere specified

Telescope

Patent

active

D03748790

REFERENCES:
patent: D309467 (1990-07-01), Miller et al.
patent: 4195922 (1980-04-01), Hajnal
patent: 4235541 (1980-11-01), Jamel
patent: 4375913 (1983-03-01), Hajnal
patent: 5469236 (1995-11-01), Roessel

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