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US Patent: 486,810
Automatic Indicating Calipers
Patentee:
John W. Porter - Waukesha, WI

USPTO Classifications:
33/651

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

Assignees:
Jame McNaughton - Waukesha, 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:
USPTO pdf tiff
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