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US Patent: 1,908,081
Screw driver
Patentee:
John P. Thompson (exact or similar names) - Portland, OR

USPTO Classifications:
81/460

Tool Categories:
screwdrivers

Assignees:
H. F. Phillips - Portland, OR

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jun. 17, 1932
Granted: May 09, 1933

Patent Pictures:
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Description:
This is the immediate predecessor to the Phillips screwdriver. Thompson was reportedly unable to find anyone who could manufacture his screw and then sold his rights to Henry F. Phillips. See also Thompson's patent for the screw matching this screwdriver: patent 1,908,080.

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