For the Inventor, By the Inventor

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Portland, OR, United States of America

Sentrol, Inc.

USPTO Granted Patents = 45

Trademarks = 1

Forward Citations = 1,088

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34 inventors (with patents filed for the assignee):

Thomas J Holce (15 out of 20 patents)

Charles M Huckins (15 out of 17 patents)

William E Abel (10 out of 10 patents)

4. Douglas Henry Marman (8 out of 40 patents)

5. Robert Gerard Fischette (5 out of 9 patents)

6. Kirk Rodney Johnson (4 out of 10 patents)

7. Maki Myoga (2 out of 10 patents)

8. Keith E Flint (2 out of 2 patents)

9. Robert C Winters (2 out of 2 patents)

10. Richard A Smith (2 out of 2 patents)

11. Mark A Peltier (2 out of 5 patents)

12. David S Terrett (2 out of 2 patents)

13. Scot R Newport (2 out of 2 patents)

14. David John Sayler (1 out of 58 patents)

15. David A Bruno (1 out of 18 patents)

Core Competencies:

Battery Saving Mechanism

Smoke Detector

Security System

Glass Break Detector

Magnetic Switch Assembly

Wireless Security

Intrusion Detection

Alarm Technology

Fault Indication Technique

Compact Security Switch

Heat Detector

Emergency Alarm System

45 patents: Sort by Forward Citations

1. 5804891 - Battery saving switching mechanism (1998-09-08),

2. 5777552 - Curtain door alarm (1998-07-07),

3. 5708414 - Sensitivity fault indication technique implemented in smoke detector (1998-01-13),

4. D384875 - Plunger lock mechanism (1997-10-14),

5. 5656982 - Plunger-operated alarm switch assembly (1997-08-12),

6. 5635887 - Compact rare earth magnet security switch assembly (1997-06-03),

7. 5565852 - Smoke detector with digital display (1996-10-15),

8. 5546074 - Smoke detector system with self-diagnostic capabilities and replaceable (1996-08-13),

9. 5539381 - Fixed threshold and rate of rise heat detector with dynamic thermal (1996-07-23),

10. 5534849 - Time multiplexed, false alarm resistant magnetically actuated security (1996-07-09),

11. 5510767 - Glass break detector having reduced susceptibility to false alarms (1996-04-23),

12. D361732 - Smoke detector housing (1995-08-29),

13. D359701 - Smoke detector cover (1995-06-27),

14. 5428345 - Method of and apparatus for operating a security system to produce an (1995-06-27),

15. 5311024 - Lens arrangement for intrusion detection device (1994-05-10),

Sentrol, Inc. is a leading technology solutions provider specializing in developing innovative software and hardware solutions for the telecommunications industry. With a strong focus on research and development, Sentrol is committed to delivering cutting-edge solutions that enable telecom companies to enhance their operational efficiency and improve customer experience. For over two decades, Sentrol has built a solid reputation for delivering high-quality products and services to its global clientele. Visit our website to learn more about our comprehensive range of solutions.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

45 Patents

#24 in Portland, OR

#87 in Oregon

#7,766 in US

#15,408 in the World

Portland, OR, United States of America

Sentrol, Inc.

Forward Citations = 1,088

34 inventors:

Thomas J Holce (15 out of 20 patents)

Charles M Huckins (15 out of 17 patents)

William E Abel (10 out of 10 patents)

4. Douglas Henry Marman (8 out of 40 patents)

5. Robert Gerard Fischette (5 out of 9 patents)

Please report any incorrect information to [email protected]

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