For the Inventor, By the Inventor

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Redwood City, CA, United States of America

Rosum Corporation

Calculating rank

USPTO Granted Patents = 25

% Expired Patents = 56.0

Forward Citations = 848

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11 inventors (with patents filed for the assignee):

James J Spilker, Jr (21 out of 34 patents)

Matthew Rabinowitz (20 out of 137 patents)

Jimmy Kazuhiro Omura (7 out of 10 patents)

4. Guttorm Ringstad Opshaug (2 out of 161 patents)

5. Andy Lee (2 out of 6 patents)

6. Scott Furman (1 out of 42 patents)

7. Matthew Dalton Pierce (1 out of 8 patents)

8. Ju-Yong Do (1 out of 71 patents)

9. Jim Omura (1 out of 2 patents)

10. Matthew Robinowitz (1 out of 1 patent)

11. Michael John Sabin (1 out of 17 patents)

Core Competencies:

Position Location

Digital Television

GPS Augmentation

Synchronization Codes

Robust Data Transmission

Broadcast Signals

Terrestrial Signals

Pseudo Television Transmitters

Mobile Devices

Reference Signals

Time of Arrival

Single-Frequency Network

25 patents: Sort by Forward Citations

1. 7792156 - ATSC transmitter identifier signaling (2010-09-07),

2. 7737893 - Positioning in a single-frequency network (2010-06-15),

3. 7733270 - Position location using global positioning signals augmented by broadcast television signals (2010-06-08),

4. 7692587 - Rapid acquisition and correlation of synchronization codes for mobile devices with limited memory and computational power (2010-04-06),

5. 7471244 - Monitor units for television signals (2008-12-30),

6. 7466266 - Psuedo television transmitters for position location (2008-12-16),

7. 7463195 - Position location using global positioning signals augmented by broadcast television signals (2008-12-09),

8. 7372405 - Position location using digital video broadcast television signals (2008-05-13),

9. 7307665 - Method and system for generating reference signals with improved correlation characteristics for accurate time of arrival or position determination (2007-12-11),

10. 7126536 - Position location using terrestrial digital video broadcast television signals (2006-10-24),

11. 7042949 - Robust data transmission using broadcast digital television signals (2006-05-09),

12. 6970132 - Targeted data transmission and location services using digital television signaling (2005-11-29),

13. 6963306 - Position location and data transmission using pseudo digital television transmitters (2005-11-08),

14. 6961020 - Position location using broadcast analog television signals (2005-11-01),

15. 6917328 - Radio frequency device for receiving TV signals and GPS satellite signals and performing positioning (2005-07-12),

Company Overview

Rosum Corporation is a technology company based in Redwood City, California, specializing in advanced positioning and timing solutions. The organization focuses on developing innovative systems that leverage satellite signals to enhance location accuracy and synchronization across various applications. Rosum's expertise spans multiple domains, including telecommunications and navigation, providing critical infrastructure for industries that rely on precise timing and geolocation services.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 27 2026

25 Patents

#79 in Redwood City, CA

#3,162 in California

#13,379 in US

#25,748 in the World

Redwood City, CA, United States of America

Rosum Corporation

Forward Citations = 848

11 inventors:

James J Spilker, Jr (21 out of 34 patents)

Matthew Rabinowitz (20 out of 137 patents)

Jimmy Kazuhiro Omura (7 out of 10 patents)

4. Guttorm Ringstad Opshaug (2 out of 161 patents)

5. Andy Lee (2 out of 6 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Rosum Corporation. Retrieved from https://idiyas.com/company/rosum

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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