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US Patent: 384,771
Micrometer Gage
Patentee:
John A. MacDonald - Lowell, MA

USPTO Classifications:
33/796, 33/806

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

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Albert M. Moore
Gertude M. Day

Patent Dates:
Applied: Mar. 21, 1887
Granted: Jun. 19, 1888

Patent Pictures:
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Description:
My invention relates to micrometer-gages, to and has for its object to attain greater ease of adjustment and greater accuracy of measurement.

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