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Beaverton, OR, United States of America

Protocol Systems, Inc.

USPTO Granted Patents = 10

Trademarks = 1

Forward Citations = 345

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12 inventors (with patents filed for the assignee):

Charles L Davis (4 out of 7 patents)

Thomas J Dorsett (3 out of 3 patents)

John R Marshall (2 out of 8 patents)

4. Craig H Nelson (2 out of 7 patents)

5. Ronald G Bennett (2 out of 2 patents)

6. Lee A Taylor (2 out of 2 patents)

7. Farzin Guilak (1 out of 8 patents)

8. Paul R Caron (1 out of 10 patents)

9. Paul D Patterson (1 out of 1 patent)

10. Stuart L Gallant (1 out of 7 patents)

11. Walter E Palmer (1 out of 8 patents)

12. Herbert R Salisbury (1 out of 1 patent)

10 patents: Sort by Forward Citations

1. 6405076 - Artifact rejector for repetitive physiologic-event-signal data (2002-06-11),

2. 6093152 - Pulse width modulation valve control for vital sign monitors (2000-07-25),

3. 5692513 - Noninvasive-blood-pressure(NIBP) monitoring apparatus with (1997-12-02),

4. 5657398 - High-quality, low-bit-rate method of compressing waveform data (1997-08-12),

5. 5568814 - Ambulatory patient monitoring system (1996-10-29),

6. 5351694 - Noninvasive-blood-pressure (NIBP) monitoring apparatus with (1994-10-04),

7. 5339822 - Method of validating physiologic events resulting from a heartbeat (1994-08-23),

8. 5231991 - Apparatus for promoting waste-free primary flow in a patient monitoring (1993-08-03),

9. 4949710 - Method of artifact rejection for noninvasive blood-pressure measurement (1990-08-21),

10. 4889133 - Method for noninvasive blood-pressure measurement by evaluation of (1989-12-26),

Protocol Systems, Inc. is a leading provider of IT solutions and services for businesses of all sizes. With a focus on delivering innovative technology solutions, we help our clients optimize their operations, improve productivity, and achieve their business goals. Our team of experienced professionals offers a range of services including network infrastructure setup, cybersecurity solutions, cloud computing, and IT consulting. Visit our website to learn more about how Protocol Systems can help your business thrive in the digital age.

Profile summary based on public USPTO records.

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USPTO Data Jan 1 1976 - Sep 29 2026

10 Patents

#37 in Beaverton, OR

#318 in Oregon

#29,828 in US

#55,954 in the World

Beaverton, OR, United States of America

Protocol Systems, Inc.

Forward Citations = 345

12 inventors:

Charles L Davis (4 out of 7 patents)

Thomas J Dorsett (3 out of 3 patents)

John R Marshall (2 out of 8 patents)

4. Craig H Nelson (2 out of 7 patents)

5. Ronald G Bennett (2 out of 2 patents)

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