Drill bit

Description

FIG. 1 is a side view of the drill bit showing the novel design;

FIG. 2 is a top view thereof; and

FIG. 3 is a bottom view thereof.

Referenced Cited
U.S. Patent Documents
D178899 October 1956 Olsen
D239317 March 1976 Spencer
1799676 April 1931 Childs
2203747 June 1940 Sandstone
2342931 February 1944 Fortune
2966949 January 1961 Wepsala
4230193 October 28, 1980 Logan
4230194 October 28, 1980 Logan
Patent History
Patent number: D262630
Type: Grant
Filed: Jan 19, 1979
Date of Patent: Jan 12, 1982
Assignee: Robert W. Lee (Oklahoma City, OK)
Inventor: Clifford K. Logan, Jr. (Oklahoma City, OK)
Primary Examiner: Veronica O'Keefe
Attorney: C. Clark Dougherty, Jr.
Application Number: 6/4,687