For the Inventor, By the Inventor

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Fort Worth, TX, United States of America

Gearhart Industries, Inc.

USPTO Granted Patents = 33

Forward Citations = 694

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29 inventors (with patents filed for the assignee):

Jamie B Terrell (8 out of 16 patents)

Donna K Pratt (5 out of 5 patents)

Bobby J Hallmark (3 out of 11 patents)

4. Edward C Schwind (2 out of 2 patents)

5. John W Stoltz (2 out of 2 patents)

6. Orien M Knight (2 out of 2 patents)

7. Arthur F Kuckes (1 out of 44 patents)

8. Voldi E Maki, Jr (1 out of 21 patents)

9. Albert P Davis (1 out of 7 patents)

10. Roland Edward Chemali (1 out of 41 patents)

11. Marcel L Mougne (1 out of 3 patents)

12. Edward R Basham (1 out of 3 patents)

13. L Max Mosely (1 out of 1 patent)

14. James M Peppers (1 out of 4 patents)

15. Igor Fraiberg (1 out of 1 patent)

Core Competencies:

Gamma Radiation Measurement

Borehole Casing Investigation

Chemical Cutting Apparatus

Downhole Logging

Well Formation Testing

Seismic Well Logging

Earth Formation Resistivity

Cable Measurement

Porosity Determination

Enhanced Flow Tool

Gas Detection System

Magnetostrictive Transducer

33 patents: Sort by Forward Citations

1. 4730263 - Method and device for measuring gamma radiation (1988-03-08),

2. 4709357 - Method and apparatus for acoustically investigating a borehole casing (1987-11-24),

3. 4703804 - Debris removal and gauge ring device and method (1987-11-03),

4. 4697638 - Downhole logging and servicing system with manipulatable logging and (1987-10-06),

5. 4694166 - Logging device having bimetallic insulating flask (1987-09-15),

6. 4646026 - Method and apparatus for measuring resistivity of an earth formation (1987-02-24),

7. 4620591 - Chemical cutting apparatus having selective pressure bleed-off (1986-11-04),

8. 4619318 - Chemical cutting method and apparatus (1986-10-28),

9. 4613394 - Staged chemical pipe cutter (1986-09-23),

10. 4603578 - Side entry sub with tension release wireline cable clamp (1986-08-05),

11. 4562743 - Cable elongation measurement apparatus (1986-01-07),

12. 4558220 - Radioactivity well logging (1985-12-10),

13. 4530161 - Caliper tool using magnetostrictive displacement transducer (1985-07-23),

14. 4523148 - Method and apparatus for determining the spontaneous earth potential log (1985-06-11),

15. 4506729 - Drill string sub with self closing cable port valve (1985-03-26),

Company Overview

Gearhart Industries, Inc. is a prominent player in the manufacturing sector, specializing in advanced engineering solutions and innovative products. Based in Fort Worth, Texas, the company focuses on developing high-quality components and systems for various industries, including aerospace, defense, and energy. With a commitment to research and development, Gearhart Industries leverages cutting-edge technology to enhance operational efficiency and deliver tailored solutions that meet the evolving needs of its clients across diverse markets.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

33 Patents

#26 in Fort Worth, TX

#561 in Texas

#10,309 in US

#20,162 in the World

Fort Worth, TX, United States of America

Gearhart Industries, Inc.

Forward Citations = 694

29 inventors:

Jamie B Terrell (8 out of 16 patents)

Donna K Pratt (5 out of 5 patents)

Bobby J Hallmark (3 out of 11 patents)

4. Edward C Schwind (2 out of 2 patents)

5. John W Stoltz (2 out of 2 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gearhart Industries, Inc.. Retrieved from https://idiyas.com/company/gearhart-industries

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]

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