Five blade drill bit
Latest Dresser Industries, Inc. Patents:
Description
FIG. 1 is a top plan view of a four blade drill bit showing our new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a rear elevational view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a top, front, left side perspective view thereof.
Referenced Cited
U.S. Patent Documents
Other references
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Patent History
Patent number: D403336
Type: Grant
Filed: Dec 2, 1997
Date of Patent: Dec 29, 1998
Assignee: Dresser Industries, Inc. (Houston, TX)
Inventors: Robert W. Arfele (Houston, TX), George A. Espiritu (Houston, TX), Ed R. Martin, Jr. (Spring, TX)
Primary Examiner: Antoine Duval Davis
Attorney: Browning Bushman
Application Number: 0/80,371
Type: Grant
Filed: Dec 2, 1997
Date of Patent: Dec 29, 1998
Assignee: Dresser Industries, Inc. (Houston, TX)
Inventors: Robert W. Arfele (Houston, TX), George A. Espiritu (Houston, TX), Ed R. Martin, Jr. (Spring, TX)
Primary Examiner: Antoine Duval Davis
Attorney: Browning Bushman
Application Number: 0/80,371
Classifications
Current U.S. Class:
Cutting Tool, E.g., Drill Bit, Etc. (D15/139)
International Classification: 1509;
International Classification: 1509;