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Patent number:
Patent Date:
US Patent: 1,234,342
Attachment for Calipers
Patentee:
Robert A. Johnson (
exact
or
similar
names) - Springfield, Hampden County, MA
USPTO Classifications:
33/828
,
D10/74
Tool Categories:
metalworking tools
:
machinist tools
:
measuring tools
:
micrometer attachments
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Aug. 16, 1915
Granted:
Jul. 24, 1917
Patent Pictures:
USPTO
(New site tip)
Google Patents
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