Drill bit for a down-the-hole drill hammer
Description
The broken lines in
Claims
The ornamental design for a drill bit for a down-the-hole drill hammer, as shown and described.
Referenced Cited
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Patent History
Patent number: D872142
Type: Grant
Filed: Oct 18, 2017
Date of Patent: Jan 7, 2020
Assignee: Center Rock Inc. (Berlin, PA)
Inventor: Leland H. Lyon (Roanoke, VA)
Primary Examiner: Patricia A Palasik
Application Number: 29/622,653
Type: Grant
Filed: Oct 18, 2017
Date of Patent: Jan 7, 2020
Assignee: Center Rock Inc. (Berlin, PA)
Inventor: Leland H. Lyon (Roanoke, VA)
Primary Examiner: Patricia A Palasik
Application Number: 29/622,653
Classifications
Current U.S. Class:
Cutting Tool, E.g., Drill Bit, Etc. (D15/139)