Screw driver bit

- Helen P. Espin

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Description

FIG. 1 is a top, front and one side perspective view of the screw driver bit showing my new design, the opposite side being identical to the one shown;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
539155 May 1895 Tower
2550635 April 1951 Brown et al.
2673359 March 1954 Stellin
2815054 December 1957 Cummaro
3122963 March 1964 Borgeson
3363500 January 1968 Simko
3913647 October 1975 Arnn
Foreign Patent Documents
747810 April 1933 FRX
84698 October 1935 SEX
1277117 June 1972 GBX
Patent History
Patent number: D312034
Type: Grant
Filed: Nov 14, 1986
Date of Patent: Nov 13, 1990
Assignee: Helen P. Espin (Charlotte, NC)
Inventor: Mario W. Espin (Charlotte, NC)
Primary Examiner: Bruce W. Dunkins
Assistant Examiner: Clare E. Heflin
Law Firm: Shefte, Pinckney & Sawyer
Application Number: 6/930,873
Classifications
Current U.S. Class: D 8/86; D 8/70; Cutting Tool, E.g., Drill Bit, Etc. (D15/139)