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Patent number:
Patent Date:
US Patent: 7,689
Spring Calipers
Patentee:
William W. Smith (
exact
or
similar
names) - Boston, MA
USPTO Classifications:
33/558.1
Tool Categories:
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Joshua Stevens
E. V. B. Holcomb
Patent Dates:
Granted:
Oct. 01, 1850
Patent Pictures:
USPTO
(New site tip)
Google Patents
Report data errors or omissions to steward Russ Allen.
Description:
Circular spring enclosed within the caliper head.
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