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US Patent: 1,908,080
Screw
Patentee:
John P. Thompson (exact or similar names) - Portland, OR

USPTO Classifications:
16/DIG.039, 411/403, 411/919, 470/60, 470/9

Tool Categories:

Assignees:
H. F. Phillips - Portland, OR

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: May 20, 1932
Granted: May 09, 1933

Patent Pictures:
USPTO (New site tip)
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Description:
This is the immediate predecessor to the Phillips screw. Thompson was reportedly unable to find anyone who could manufacture his screw and then sold his rights to Henry F. Phillips, who in turn licensed the design to American Screw Company, who quickly lined up General Motors as a customer. See also Thompson's patent for the screwdriver matching this screw: patent 1,908,081.

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