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Patent number:
Patent Date:
US Patent: 439,975
Caliper & Centering Gage
Patentee:
William O. Nelson (
exact
or
similar
names) - Baltimore, MD
USPTO Classifications:
33/548
,
33/672
Tool Categories:
layout tools
:
measurement gauges
layout tools
:
marking gauges
:
center marking gauges
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
J. Q. A. Sand
T. F. Cavanaugh
Patent Dates:
Applied:
Feb. 17, 1890
Granted:
Nov. 04, 1890
Patent Pictures:
USPTO
(New site tip)
Google Patents
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