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Patent number:
Patent Date:
US Patent: 101,207
Improvement in Screw and Screw-Driver
Patentee:
Allen S. Apgar (
exact
or
similar
names) - New York, NY
USPTO Classifications:
411/403
,
411/919
,
81/436
Tool Categories:
screwdrivers
:
screwdriver blades
Assignees:
Allen S. Apgar
- New York, NY
Isaac Arnold, Jr.
- Haddam, MA
Manufacturer:
Not known to have been produced
Witnesses:
S. R. Narine
O. D. Roberts
Patent Dates:
Granted:
Mar. 29, 1870
Patent Pictures:
USPTO
(New site tip)
Google Patents
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