Pasadena, CA, United States of America

Gemstar Developement Corporation


USPTO Granted Patents = 70



Trademarks = 1

Forward Citations = 7,110

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30 inventors (with patents filed for the assignee):

goldMedal Henry C Yuen (45 out of 104 patents)

silverMedal Daniel S Kwoh (26 out of 62 patents)

bronzeMedal 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 E Ward (7 out of 8 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
Targeted Advertisement
Television Program Scheduling
Video Search Engine
Compressed Codes
Simulated PIP Window
Digital Rights Management
Television Calendar
Remote Control Technology
Broadcast Recording Control
Customized Television Programming

70 patents:

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USPTO Data Jan 1 1976 - Dec 23 2025

70 Patents

#5 in Pasadena, CA

#1,194 in California

#5,013 in US

#10,208 in the World

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Pasadena, CA, United States of America
Forward Citations = 7,110

30 inventors:

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