Bruce (Boris) P. Cherewyk

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Calgary, CA

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Patents Grantslast 30 patents

Information Patent Grant
Tapered sleeve and fracturing head system for protecting a conveyan...
- Patent number 8,122,949
- Issue date Feb 28, 2012
- Isolation Equipment Services Inc
- Bruce (Boris) P. Cherewyk
- E21 - EARTH DRILLING MINING