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Wilmington, DE, United States of America

Columbia Gas System Service Corporation

USPTO Granted Patents = 29

Forward Citations = 601

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33 inventors (with patents filed for the assignee):

Edward A Reid, Jr (10 out of 10 patents)

F Bert Cook (9 out of 13 patents)

Edgar M Purvis (6 out of 6 patents)

4. Norman D Malcosky (5 out of 5 patents)

5. Stephen P Cremean (3 out of 4 patents)

6. George W Myler (3 out of 3 patents)

7. James E Payne (3 out of 3 patents)

8. Edward M Winter (3 out of 3 patents)

9. John C Murphy (2 out of 15 patents)

10. Stephen E Petty (2 out of 9 patents)

11. Richard N Christensen (2 out of 12 patents)

12. Ralph F Cohn (2 out of 3 patents)

13. Howard C Meacham, Jr (2 out of 4 patents)

14. Kevin R McGahey (2 out of 4 patents)

15. Patrick J Moran (2 out of 3 patents)

29 patents: Sort by Forward Citations

1. 5339654 - Heat transfer apparatus (1994-08-23),

2. 5126654 - Non-invasive, high resolution detection of electrical currents and (1992-06-30),

3. 5087873 - Non-invasive, high resolution detection of electrical currents and (1992-02-11),

4. 5077986 - Energy recovery system for absorption heat pumps (1992-01-07),

5. 5067330 - Heat transfer apparatus for heat pumps (1991-11-26),

6. 4805450 - Method of locating hydrocarbon producing strata and the instrument (1989-02-21),

7. 4783990 - Apparatus for measuring the quantity of gas pumped by a compressor (1988-11-15),

8. 4773255 - Apparatus for injecting gas into a pipeline (1988-09-27),

9. 4742693 - Absorption refrigeration and heat pump system (1988-05-10),

10. 4742687 - Dual cooling/heating process and composition (1988-05-10),

11. 4722193 - Absorption refrigeration and heat pump system (1988-02-02),

12. 4719767 - Absorption refrigeration and heat pump system (1988-01-19),

13. 4691532 - Dual cooling/heating system energy recovery (1987-09-08),

14. 4690689 - Gas tracer composition and method (1987-09-01),

15. 4676095 - Apparatus for measuring the work performed by a gas compressor (1987-06-30),

Columbia Gas System Service Corporation is a natural gas utility company operating in the United States. They provide safe and reliable natural gas services to residential, commercial, and industrial customers. Columbia Gas is committed to ensuring the efficiency and affordability of their services while prioritizing customer satisfaction and environmental stewardship.

This text is generated by artificial intelligence and may not be accurate.

Company Badge

USPTO Data Jan 1 1976 - Dec 9 2025

29 Patents

#149 in Wilmington, DE

#190 in Delaware

#11,219 in US

#21,844 in the World

Wilmington, DE, United States of America

Columbia Gas System Service Corporation

Forward Citations = 601

33 inventors:

Edward A Reid, Jr (10 out of 10 patents)

F Bert Cook (9 out of 13 patents)

Edgar M Purvis (6 out of 6 patents)

4. Norman D Malcosky (5 out of 5 patents)

5. Stephen P Cremean (3 out of 4 patents)

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