Bone drill bit for bone fasteners

- American Cyanamid Company
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Description

FIG. 1 is a perspective view of a bone drill bit for bone fasteners, showing our new design;

FIG. 2 is a side elevational thereof, taken from the left side of FIG. 4;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a rear elevational view thereof.

FIGS. 1, 2 and 3 have been shown broken away because the article is of indefinite length.

Referenced Cited
U.S. Patent Documents
4157714 June 12, 1979 Fultz et al.
4341206 July 27, 1982 Perrett et al.
4649919 March 17, 1987 Thimsen et al.
4798213 January 17, 1989 Doppelt
4830000 May 16, 1989 Shutt
4844064 July 4, 1989 Thimsen et al.
4951690 August 28, 1990 Baker
4978350 December 18, 1990 Wagenknecht
5055105 October 8, 1991 Hamlin et al.
Patent History
Patent number: D332492
Type: Grant
Filed: Jan 31, 1990
Date of Patent: Jan 12, 1993
Assignee: American Cyanamid Company (Stamford, CT)
Inventors: Thomas D. Rosenberg (Salt Lake City, UT), Paul DiCarlo (Wayland, MA)
Primary Examiner: Stella Reid
Assistant Examiner: I. Simmons
Attorney: Douglas E. Denninger
Application Number: 7/473,200