EASTMAN CHRISTENSEN COMPANY

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Technologies

Intl Class Technology # of Patents Rank
 
 
 
E21B EARTH OR ROCK DRILLING 169
 
 
 
E21C MINING OR QUARRYING114

Top Patents (by citation)

Patent # Title Filing Date Issue Date Intl Class Cited #
5,090,491 Earth boring drill bit with matrix displacing materialMar 04, 91Feb 25, 92[E21B]75
RE32463 Method of and apparatus for telemetering information from a point in a well borehole to the earth's surfaceNov 06, 79Jul 28, 87[E21C]36

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Recent Patents

Patent # Title Filing Date Issue Date Intl Class
5,090,491 Earth boring drill bit with matrix displacing materialMar 04, 91Feb 25, 92[E21B]
RE32463 Method of and apparatus for telemetering information from a point in a well borehole to the earth's surfaceNov 06, 79Jul 28, 87[E21C]

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Top Inventors for This Owner

Inventor Name Address # of Patent/Pub
Jurgens Rainer
Altencelle, DE
21
Radford Steven R
West Jordan, UT
10
Aumann James T
Salt Lake City, UT
9
Hyland Craig R
Magna, UT
6
Kruger Volker
Celle, DE
6
Davis J Stanley
Sandy, UT
5
Grappendorf Richard H
Riverton, UT
5
Ostertag Alfred
Celle, DE
5
Tibbitts Gordon A
Salt Lake City, UT
5
Meskin Alexander K
Salt Lake City, UT
4