3-point/5-point fastener, 3-point/5-point bit

Tools – Wrench – screwdriver – or driver therefor – Having work engaging and force exerting portion inserted...

Reexamination Certificate

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Details

C081S461000

Reexamination Certificate

active

07073416

ABSTRACT:
The present invention provides a fastener that can be used with a variety of bits as well as a fastener with several security features that can be used only with a very specialized bit and, also, a fastener/bit combination that can be used in conjunction with high-torque power tools. Specifically, this invention allows the use of a straight blade, a three-blade or a five-blade driver with the same fastener head.

REFERENCES:
patent: 2046837 (1936-07-01), Phillips
patent: 2397216 (1946-03-01), Stellin
patent: 2445978 (1948-04-01), Stellin
patent: 3658105 (1972-04-01), Burt et al.
patent: 3872904 (1975-03-01), Barlow
patent: 4430035 (1984-02-01), Rodseth
patent: 4938731 (1990-07-01), Nguyen et al.
patent: 5171117 (1992-12-01), Seidl
patent: D413254 (1999-08-01), Lee
patent: D414402 (1999-09-01), Lee
patent: 6293745 (2001-09-01), Lu
patent: 6402449 (2002-06-01), Lin
patent: D472434 (2003-04-01), Trempala
patent: 6626627 (2003-09-01), Oesterle
patent: 2002/0017170 (2002-02-01), Amis

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