John Andrew Markiw

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Okotoks AB, CA

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Patents Grantslast 30 patents

Information Patent Grant
Metal ring seal and improved profile selective system for downhole...
- Patent number 10,571,027
- Issue date Feb 25, 2020
- John Andrew Markiw
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...

Patents Applicationslast 30 patents

Information Patent Application
Metal Ring Seal and Improved Profile Selective System for Downhole...
- Publication number 20180355976
- Publication date Dec 13, 2018
- Gryphon Oilfield Solutions, LLC
- John Andrew Markiw
- E21 - EARTH DRILLING MINING