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US Patent: 703,725
Lens measuring instrument
Diopter gage
Patentee:
Franklin Hardinge - Chicago, IL

USPTO Classifications:
33/507

Tool Categories:
trade specific : optician

Assignees:
Geneva Optical Co. - Chicago, IL

Manufacturer:
Geneva Optical Co. - Chicago, IL

Witnesses:
Alberta Adamick
Harry L. Clapp

Patent Dates:
Applied: Jul. 12, 1900
Granted: Jul. 01, 1902

Patent Pictures:
USPTO pdf tiff
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"Vintage Machinery" entry for Hardinge Brothers
Description:
See also patent 1,151,635.

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