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Down Hole Injection, Inc.
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Wichita, KS, US
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Patents Grants
last 30 patents
Information
Patent Grant
Dual annulus production tool
Patent number
5,979,552
Issue date
Nov 9, 1999
Down Hole Injection, Inc.
Clarence Michael
E21 - EARTH DRILLING MINING
Patents Applications
last 30 patents
Trademark
last 30 trademarks
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Trademark
75334483 - DHI DOWN HOLE INJECTION, INC.
Serial number
75334483
Filing date
Aug 1, 1997
Down Hole Injection, Inc.
7 - Machines and machine tools