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James Jing Yao
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Mississauga, CA
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Patents Grants
last 30 patents
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Patent Grant
Threaded coupling for percussion drill bit
Patent number
11,199,056
Issue date
Dec 14, 2021
James Jing Yao
B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
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Patent Grant
Straight hole drilling system
Patent number
6,196,598
Issue date
Mar 6, 2001
Boart Longyear, Inc.
James Jing Yao
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Information
Patent Application
THREADED COUPLING FOR PERCUSSION DRILL BIT
Publication number
20200248510
Publication date
Aug 6, 2020
Hardrock Innovations Inc.
James Jing Yao
E21 - EARTH DRILLING MINING
Information
Patent Application
JOINT AND JOINT PARTS FOR DRILL STRING COMPONENTS AND COMPONENTS
Publication number
20170089149
Publication date
Mar 30, 2017
ATLAS COPCO SECOROC AB
James J. Yao
E21 - EARTH DRILLING MINING