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Patent number:
Patent Date:
US Patent: 557,246
Photographic Exposure Meter
Patentee:
George Frederick Wynne (
exact
or
similar
names) - Minera, Denbigh County, Wales, England
USPTO Classifications:
235/64.7
,
235/69
,
235/83
,
396/295
Tool Categories:
specialty tools
:
slide rules
:
special purpose slide rules
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Jan. 25, 1894
Granted:
Mar. 31, 1896
Patent Pictures:
USPTO
(New site tip)
Google Patents
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