For the Inventor, By the Inventor

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Stafford, TX, United States of America

National Coupling Company, Inc.

USPTO Granted Patents = 105

% Expired Patents = 6.7

CIPO Patents = 1

EPO Patents = 1

Trademarks = 6

Forward Citations = 1,297

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18 inventors (with patents filed for the assignee):

Robert E Smith, Iii (97 out of 109 patents)

Chris Roy (10 out of 10 patents)

Frank Harold Hollister (9 out of 12 patents)

4. Richard R Watson (6 out of 26 patents)

5. Timothy Goggans (5 out of 6 patents)

6. Scott Stolle (5 out of 5 patents)

7. Josh Williams (4 out of 4 patents)

8. Robert E Smith, Iv (3 out of 3 patents)

9. Maurice Slot (3 out of 3 patents)

10. Nathan Zepeda (3 out of 3 patents)

11. Max Stetzer (2 out of 2 patents)

12. Thomas Rogala (2 out of 2 patents)

13. Stephen L Wells (1 out of 1 patent)

14. Maurice Slot, Iii (1 out of 1 patent)

15. Nathan Smith (1 out of 1 patent)

Core Competencies:

Undersea Hydraulic Coupling

Pressure-Energized Seals

Subsea Control Systems

Chemical Injection

Dovetail Seal

Dual-Action Check Valve

Pressure-Compensated Valve

Metal Bore Liner

Floating Seal

Probe Seal

Hydraulic Coupling Member

Bore Liner

105 patents: Sort by Forward Citations

1. 12698858 - Hydraulic coupling with dovetail seal having multiple radial sealing surfaces and inner biasing element (2026-08-04),

2. 12650052 - Regulator having check valve manifold for use in subsea control circuit (2026-06-09),

3. 12534967 - System and method for supporting risers from floating vessel (2026-01-27),

4. 12173824 - Hydraulic coupling with dovetail seal having multiple radial sealing surfaces and inner biasing element (2024-12-24),

5. 12173576 - Regulator having check valve manifold for use in subsea control circuit (2024-12-24),

6. 11920704 - Undersea hydraulic coupling with multiple pressure-energized metal seals (2024-03-05),

7. 11905782 - Regulator having check valve manifold for use in subsea control circuit (2024-02-20),

8. 11614187 - Undersea hydraulic coupling with multiple pressure-energized metal seals (2023-03-28),

9. 11512553 - Undersea hydraulic coupling with multiple pressure-energized metal seals (2022-11-29),

10. 11454329 - Pressure-compensated, subsea chemical injection valve (2022-09-27),

11. 11181216 - Pressure-energized probe seal for female hydraulic coupling member (2021-11-23),

12. 11105435 - Subsea bop control system with dual-action check valve (2021-08-31),

13. 11085545 - Pilot-actuated spool valve having rod retainer (2021-08-10),

14. 10865892 - Subsea valve with non-circular sliding metal seals (2020-12-15),

15. 10859420 - Autonomous chemical injection system for oil and gas wells (2020-12-08),

Company Overview

National Coupling Company, Inc. is a specialized manufacturer based in Stafford, Texas, focusing on undersea hydraulic coupling technologies. The company develops advanced solutions for subsea applications, including pressure-energized seals and subsea control systems. Their expertise extends to chemical injection systems, dovetail seals, dual-action check valves, pressure-compensated valves, and metal bore liners, catering to the needs of industries operating in challenging underwater environments.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 20 2026

105 Patents

#1 in Stafford, TX

#200 in Texas

#3,627 in US

#7,466 in the World

Stafford, TX, United States of America

National Coupling Company, Inc.

Forward Citations = 1,297

18 inventors:

Robert E Smith, Iii (97 out of 109 patents)

Chris Roy (10 out of 10 patents)

Frank Harold Hollister (9 out of 12 patents)

4. Richard R Watson (6 out of 26 patents)

5. Timothy Goggans (5 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: National Coupling Company, Inc.. Retrieved from https://idiyas.com/company/national-coupling-company

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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