Screw with improved head design
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United States of America Patent
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-
Oct 25, 1994
Grant Date -
N/A
app pub date -
Sep 9, 1993
filing date -
Sep 9, 1993
priority date (Note) -
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status (Latency Note)
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Abstract
A screw having a driving socket capable of receiving a square socket (Robertson) type driver, a cross-recess (Phillips) type screw driver, and a flat blade driver.
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