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US Patent: 2,046,839
Screw
Patentees:
Henry F. Phillips (exact or similar names) - Portland, OR
Thomas M. Fitzpatrick (exact or similar names) - Portland, OR

USPTO Classifications:
411/404, 411/919

Tool Categories:

Assignees:
Phillips Screw Company - Wilmington, DE

Manufacturer:
Unknown

Witnesses:
Unknown

Patent Dates:
Applied: Jan. 15, 1935
Granted: Jul. 07, 1936

Patent Pictures:
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Description:
Improvement of Phillips previous application of 9 May 1933. Companion patent with the corresponding screwdriver 2046838.

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