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US Patent: 486,810
Automatic Indicating Calipers
Patentee:
John W. Porter (exact or similar names) - Waukesha, Waukesha County, WI

USPTO Classifications:
33/651

Tool Categories:
metalworking tools : machinist tools : measuring tools : indicating calipers

Assignees:
Jame McNaughton - Waukesha, Waukesha County, WI

Manufacturer:
Not known to have been produced

Witnesses:
C. E. Armin
Abbie M. Peabody

Patent Dates:
Applied: Aug. 15, 1892
Granted: Nov. 22, 1892

Patent Pictures:
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