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Patent number:
Patent Date:
US Patent: 306,492
Screw
Improvement in Screws
Patentee:
George W. Jackman (
exact
or
similar
names) - Littleton, NH
USPTO Classifications:
411/406
Tool Categories:
hardware
:
fasteners
:
screws
Assignees:
None
Manufacturer:
Not known to have been produced
Witnesses:
Edward Jordon
James Hillhouse
Patent Dates:
Applied:
Feb. 16, 1884
Granted:
Oct. 14, 1884
Patent Pictures:
USPTO
(New site tip)
Google Patents
Report data errors or omissions to steward Steve Gosselin
Description:
This is the patent for the screw used by Patent
306491
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