For the Inventor, By the Inventor

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Pasadena, CA, United States of America

Gemstar Developement Corporation

USPTO Granted Patents = 70

% Expired Patents = 27.1

CIPO Patents = 7

EPO Patents = 3

Trademarks = 1

Forward Citations = 7,157

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30 inventors (with patents filed for the assignee):

Henry C Yuen (45 out of 104 patents)

Daniel S Kwoh (26 out of 62 patents)

Roy J Mankovitz (16 out of 81 patents)

4. Douglas B Macrae (9 out of 28 patents)

5. Kenneth S Hancock (7 out of 18 patents)

6. Thomas Edward Ward (7 out of 32 patents)

7. Elsie Y Leung (5 out of 28 patents)

8. Thomas E Westberg (2 out of 27 patents)

9. Wing P Leung (2 out of 17 patents)

10. Kwong Sang Sin (2 out of 2 patents)

11. Philip W Chan (2 out of 2 patents)

12. Michael R Levine (2 out of 60 patents)

13. Scott E Stropkay (1 out of 64 patents)

14. Jonathan B Orlick (1 out of 8 patents)

15. Ronald Alexander (1 out of 5 patents)

Core Competencies:

Electronic Program Guide

Parental Control

Television Scheduling

Video Recording

Advertisement Display

Search Engine

Digital Rights Management

Remote Control

Compressed Codes

Video Time-Shifting

Channel Scanning

Data Synchronization

70 patents: Sort by Forward Citations

1. 8918807 - System and method for modifying advertisement responsive to EPG information (2014-12-23),

2. 8761584 - System and method for searching a database of television schedule information (2014-06-24),

3. 8739216 - Simulated PIP window in EPG (2014-05-27),

4. 8732757 - System and method for targeted advertisement display responsive to user characteristics (2014-05-20),

5. 8726311 - System and method for modifying advertisement responsive to EPG information (2014-05-13),

6. 8635649 - System and method for modifying advertisement responsive to EPG information (2014-01-21),

7. 8635642 - Apparatus and method for parental control using V-Chip plus+ and master password (2014-01-21),

8. 8448209 - System and method for displaying advertisements responsive to EPG information (2013-05-21),

9. 8341137 - Search engine for video and graphics (2012-12-25),

10. 8341136 - Search engine for video and graphics (2012-12-25),

11. 8336071 - System and method for modifying advertisement responsive to EPG information (2012-12-18),

12. 8196167 - Simulated PIP window in EPG (2012-06-05),

13. 8006260 - Apparatus and method for parental control using V-chip plus+ and master password (2011-08-23),

14. 7996864 - Method and apparatus for displaying television programs and related text (2011-08-09),

15. 7987175 - Search engine for video and graphics (2011-07-26),

Company Overview

Gemstar Development Corporation, based in Pasadena, CA, specializes in advanced television control systems that enhance user experience and content accessibility. The company is known for its innovative technologies, including Electronic Program Guides and digital rights management solutions, which facilitate seamless television scheduling and video recording. Additionally, Gemstar focuses on parental control features and advertisement display systems, contributing to a comprehensive approach to modern television viewing and content management.

Profile summary synthesized from public USPTO records and patent filings.

Company Badge

USPTO Data Jan 1 1976 - Oct 13 2026

70 Patents

#5 in Pasadena, CA

#1,223 in California

#5,244 in US

#10,641 in the World

Pasadena, CA, United States of America

Gemstar Developement Corporation

Forward Citations = 7,157

30 inventors:

Henry C Yuen (45 out of 104 patents)

Daniel S Kwoh (26 out of 62 patents)

Roy J Mankovitz (16 out of 81 patents)

4. Douglas B Macrae (9 out of 28 patents)

5. Kenneth S Hancock (7 out of 18 patents)

IDiyas Innovation Intelligence. (2026). Company Patent Portfolio: Gemstar Developement Corporation. Retrieved from https://idiyas.com/company/gemstar-development

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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