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US Patent: 502,649
Speed Indicator for Shafting
Patentee:
Hans C. Andersen - Cambridge, MA

USPTO Classifications:
235/104, 235/120

Tool Categories:
layout tools : measurement gauges

Assignees:
Thorwald Hansen - West Somerville, MA

Manufacturer:
Not known to have been produced

Witnesses:
Louis N. Gowell
Emma L. Bennett
John C. Edwards
George W. Gregory

Patent Dates:
Applied: Nov. 25, 1892
Granted: Aug. 01, 1893

Patent Pictures:
USPTO pdf tiff
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