Forward Citations = 140

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9 inventors (with patents filed for the assignee):

Alfred Ostertag (1 out of 17 patents)

Craig R Hyland (1 out of 12 patents)

Gordon A Tibbitts (1 out of 78 patents)

4. Oleg M Kotlyar (1 out of 13 patents)

5. Volker Kruger (1 out of 10 patents)

6. Steven R Radford (1 out of 10 patents)

7. Ulrich Hense (1 out of 2 patents)

8. Robert E Iversen (1 out of 1 patent)

9. Kenneth D Enever (1 out of 1 patent)

4 patents: Sort by Forward Citations

1. 4883132 - Drag bit for drilling in plastic formation with maximum chip clearance (1989-11-28),

2. 4878548 - Nozzle retention system for a drill bit (1989-11-07),

3. 4771408 - Universal mud pulse telemetry system (1988-09-13),

4. 4698794 - Device for remote transmission of information (1987-10-06),

Company Overview

Eastman Christensen is a leading manufacturer of downhole drilling tools and solutions for the oil and gas industry. With a focus on safety, efficiency, and reliability, Eastman Christensen offers a wide range of products and services to help companies optimize their drilling operations. Visit their website to learn more about their innovative solutions and exceptional customer service.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

4 Patents

#287 in Salt Lake City, UT

#778 in Utah

#60,671 in US

Salt Lake City, UT, United States of America

Eastman Christensen

Forward Citations = 140

9 inventors:

Alfred Ostertag (1 out of 17 patents)

Craig R Hyland (1 out of 12 patents)

Gordon A Tibbitts (1 out of 78 patents)

4. Oleg M Kotlyar (1 out of 13 patents)

5. Volker Kruger (1 out of 10 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Eastman Christensen. Retrieved from https://idiyas.com/company/eastman-christensen

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]