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Patent number:
Patent Date:
US Patent: 1,034,795
Calipers
Patentee:
Nicholas Helwig (
exact
or
similar
names) - Middletown, Butler County, OH
USPTO Classifications:
33/825
Tool Categories:
metalworking tools
:
machinist tools
:
measuring tools
:
indicating calipers
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Unknown
Patent Dates:
Applied:
Dec. 14, 1911
Granted:
Aug. 06, 1912
Patent Pictures:
USPTO
(New site tip)
Google Patents
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