Marinus Hartman

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Pickering, CA

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Patents Grantslast 30 patents

Information Patent Grant
Induction watt-hour meter non-intrusive and concealed pulse initiator
- Patent number 5,495,238
- Issue date Feb 27, 1996
- Schlumberger Canada Limited
- Steven A. Baker
- G01 - MEASURING TESTING
Information Patent Grant
Induction watt-hour meter rotary disc mounting and bearing system
- Patent number 5,399,966
- Issue date Mar 21, 1995
- Schlumberger Canada Limited
- Marinus Hartman
- G01 - MEASURING TESTING
Information Patent Grant
Electric utility revenue meter polycarbonate base
- Patent number 5,364,290
- Issue date Nov 15, 1994
- Schlumberger Canada Limited
- Marinus Hartman
- G01 - MEASURING TESTING