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US Patent: 219,307
Micrometer Gage
Patentee:
John Richards - Philadelphia, PA

USPTO Classifications:
269/240, 33/813

Tool Categories:
metalworking tools : machinist tools : measuring tools : micrometers

Assignees:
None

Manufacturer:
American Standard Gauge & Tool Works - Philadelphia, PA
Betts Machine Co. - Wilmington, DE

Witnesses:
E. A. Dick
J. C. Tasker

Patent Dates:
Applied: Mar. 09, 1879
Granted: Sep. 02, 1879

Patent Pictures: [ 1 | 2 ]
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American Precision Museum
"Vintage Machinery" entry for Betts Machine Co.
Description:
The micrometer on image #2 was manufactured by the Betts Machine Co.

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