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Borislav J. Tchakarov
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Lafayette, LA, US
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last 30 patents
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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
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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