Step drill
Description
Claims
The ornamental design for a step drill as shown and described.
Referenced Cited
U.S. Patent Documents
Foreign Patent Documents
Other references
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Patent History
Patent number: D1088071
Type: Grant
Filed: Dec 27, 2024
Date of Patent: Aug 12, 2025
Assignee: SHAJENG HARDWARE CO., LTD. (Taichung)
Inventor: Jen-Tsung Liao (Taichung)
Primary Examiner: Patricia A Palasik
Application Number: 29/980,963
Type: Grant
Filed: Dec 27, 2024
Date of Patent: Aug 12, 2025
Assignee: SHAJENG HARDWARE CO., LTD. (Taichung)
Inventor: Jen-Tsung Liao (Taichung)
Primary Examiner: Patricia A Palasik
Application Number: 29/980,963
Classifications
Current U.S. Class:
Cutting Tool, E.g., Drill Bit, Etc. (D15/139)