Nikolay D. Nenkov

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Sofia, BG

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Patents Grantslast 30 patents

Information Patent Grant
Face shock absorber for extracting core-collecting pipes
- Patent number 5,083,755
- Issue date Jan 28, 1992
- Geologoprouchvatelno Predpriatie
- Nikolay D. Nenkov
- E21 - EARTH DRILLING MINING
Information Patent Grant
Face shock absorber
- Patent number 4,776,436
- Issue date Oct 11, 1988
- Geologoproutshvatelno Predpriyatie
- Nikolay D. Nenkov
- E21 - EARTH DRILLING MINING
Information Patent Grant
Fixing mechanism for a wireline core barrel of core drilling equipment
- Patent number 4,664,204
- Issue date May 12, 1987
- Vish Minno-Geolojki Institute
- Nikolay D. Nenkov
- E21 - EARTH DRILLING MINING
Information Patent Grant
Retractable core drill bit
- Patent number 4,497,382
- Issue date Feb 5, 1985
- Komitet po Goelogica
- Nikolay D. Nenkov
- E21 - EARTH DRILLING MINING