US Patent D982632 Drill bit
Is a
Date Filed
June 16, 2021
0
Date of Patent
April 4, 2023
0
Patent Application Number
29794916
0
Patent Inventor Names
Weifeng Du
0
Yongfeng Wang
0
Haijiang Fang
0
Patent Jurisdiction
Patent Number
Patent Primary Examiner
CPC Code
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