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US Patent: 1,781,470
Screw Driver
Screw holding screwdriver
Patentee:
Emil Mueller (exact or similar names) - Cranston, RI

USPTO Classifications:
81/449

Tool Categories:
specialty tools : screw starters
screwdrivers : screwdriver blades

Assignees:
None

Manufacturer:
Not known to have been produced

Witnesses:
Unknown
Patent Dates:
Applied: Apr. 11, 1930
Granted: Nov. 11, 1930

Patent Pictures:
USPTO (New site tip)
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Description:
Also Pearson's patent 2150184 Very similar.

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