Borislav J. Tchakarov

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Lafayette, LA, US

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Patents Grantslast 30 patents

Information Patent Grant
Switch actuator and flow restrictor pilot valve assembly for measur...
- Patent number 5,660,238
- Issue date Aug 26, 1997
- The Bob Fournet Company
- Leon M. Earl
- E21 - EARTH DRILLING MINING
Information Patent Grant
Self-adjusting centralizer
- Patent number 5,348,091
- Issue date Sep 20, 1994
- The Bob Fournet Company
- Borislav J. Tchakarov
- E21 - EARTH DRILLING MINING