Photography and optical equipment – Optical article not elsewhere specified – Lens or objective
Patent
1986-06-13
1988-11-15
Burke, Wallace R.
Photography and optical equipment
Optical article not elsewhere specified
Lens or objective
Patent
active
D02985420
REFERENCES:
patent: D212201 (1968-09-01), Grayson
patent: 2780853 (1957-02-01), Guthman
patent: 2858733 (1958-11-01), Lodewick et al.
patent: 3879804 (1975-04-01), Lawrence
Carlson Gregory P.
Carlson Keith L.
Burke Wallace R.
Heflin Clare E.
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