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Volker Kruger

USPTO Granted Patents = 10

CIPO Patents = 1 (Patent Applications = 1)

Average Co-Inventor Count = 1.9

ph-index = 8

Forward Citations = 269(Granted Patents)

Company Filing History:

Baker Hughes Corporation

Eastman Christensen Company

Eastman Christensen

4. 1 out of 425

Norton Christensen, Inc.

6. 2 out of 832,843

Other

patents

Years Active: 1986-1997

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10 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 5679894 - Apparatus and method for drilling boreholes (1997-10-21),

2. 5343967 - Apparatus for optional straight or directional drilling underground (1994-09-06),

3. 5065826 - Apparatus for optional straight or directional drilling underground (1991-11-19),

4. 4892420 - Friction bearing for deep well drilling tools (1990-01-09),

5. 4889195 - Drill bit direct drive for deep well drilling tools (1989-12-26),

6. 4854401 - Drill bit direct drive for deep well drilling tools (1989-08-08),

7. 4739842 - Apparatus for optional straight or directional drilling underground (1988-04-26),

8. 4698794 - Device for remote transmission of information (1987-10-06),

9. 4629013 - Drive device for a drill bit (1986-12-16),

10. 4610307 - Method and apparatus for selectively straight or directional drilling in (1986-09-09),

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