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US Patent: 496,679
Beam Calipers
Patentee:
Alfred Barker - Richfield Springs, NY

USPTO Classifications:
33/806

Tool Categories:
layout tools : measurement gauges

Assignees:
None

Manufacturer:
Unknown

Witnesses:
John C. Kehrer
C. L. House

Patent Dates:
Applied: Jan. 09, 1893
Granted: May 02, 1893

Patent Pictures:
USPTO pdf tiff
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Description:
This caliper was advertised in the 07 Jul 1894 issue of Scientific American, page 16.

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