For the Inventor, By the Inventor

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Sacramento, CA, United States of America

Exploration Logging, Inc.

USPTO Granted Patents = 18

Forward Citations = 494

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15 inventors (with patents filed for the assignee):

Henry S More (6 out of 6 patents)

Edward S Mumby (5 out of 12 patents)

John D Jeter (3 out of 30 patents)

4. Christopher E Koch (3 out of 3 patents)

5. Waldemar S Wisniewski (2 out of 2 patents)

6. Steven C Owens (1 out of 12 patents)

7. James E Meisner (1 out of 6 patents)

8. Roger L Tresler (1 out of 1 patent)

9. Micheal D Robie (1 out of 1 patent)

10. David A Close (1 out of 1 patent)

11. Trevor K Pugh (1 out of 1 patent)

12. Ronald A Hall (1 out of 4 patents)

13. George W Troy (1 out of 1 patent)

14. Takato Umeda (1 out of 1 patent)

15. Martin J Fennell (1 out of 1 patent)

18 patents: Sort by Forward Citations

1. 4904865 - Externally mounted radioactivity detector for MWD (1990-02-27),

2. 4903245 - Downhole vibration monitoring of a drillstring (1990-02-20),

3. 4756188 - Method and apparatus for compensating for drilling line stretch in (1988-07-12),

4. 4699352 - Apparatus for well logging telemetry (1987-10-13),

5. 4642800 - Noise subtraction filter (1987-02-10),

6. 4601100 - Method for making logging sleeve (1986-07-22),

7. 4550392 - Apparatus for well logging telemetry (1985-10-29),

8. 4513403 - Data encoding and synchronization for pulse telemetry (1985-04-23),

9. 4511829 - Direct current control in inductive loads (1985-04-16),

10. 4494072 - Well logging apparatus with replaceable sensor carrying insulating (1985-01-15),

11. 4483393 - Well logging apparatus and method for making same (1984-11-20),

12. 4405021 - Apparatus for well logging while drilling (1983-09-20),

13. 4386422 - Servo valve for well-logging telemetry (1983-05-31),

14. 4356629 - Method of making well logging apparatus (1982-11-02),

15. 4338565 - Method and apparatus for measuring the movement of a spiral wound wire (1982-07-06),

Exploration Logging, Inc. is a specialized technology firm based in Sacramento, California, focusing on advanced logging and measurement solutions for the oil and gas industry. The company develops innovative tools and systems that enhance subsurface exploration and data acquisition, enabling more efficient resource extraction. With a commitment to research and development, Exploration Logging, Inc. leverages cutting-edge technology to improve operational accuracy and safety in challenging environments.

Profile summary based on public USPTO records.

Company Badge

USPTO Data Jan 1 1976 - Oct 6 2026

18 Patents

#14 in Sacramento, CA

#4,284 in California

#17,952 in US

#34,187 in the World

Sacramento, CA, United States of America

Exploration Logging, Inc.

Forward Citations = 494

15 inventors:

Henry S More (6 out of 6 patents)

Edward S Mumby (5 out of 12 patents)

John D Jeter (3 out of 30 patents)

4. Christopher E Koch (3 out of 3 patents)

5. Waldemar S Wisniewski (2 out of 2 patents)

Please report any incorrect information to [email protected]

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