For the Inventor, By the Inventor

Enter assignee name

Singapore, Singapore

Freesystems Pte Ltd

USPTO Granted Patents = 12

% Expired Patents = 58.3

Trademarks = 1

Forward Citations = 133

Loading Chart...

Loading Chart...

9 inventors (with patents filed for the assignee):

Beng Huat Chua (7 out of 8 patents)

Chee Oei Chan (7 out of 28 patents)

Kah Yong Lee (4 out of 38 patents)

4. Chee Kong Siew (4 out of 9 patents)

5. Chong Lim Neoh (2 out of 5 patents)

6. Chua Beng Huat (1 out of 1 patent)

7. Chan Chee Oei (1 out of 3 patents)

8. Siew Chee Kong (1 out of 1 patent)

9. Bena Huat Chua (1 out of 1 patent)

12 patents: Sort by Forward Citations

1. 7680202 - Digital wireless audio communication system employing time diversity (2010-03-16),

2. 7555031 - Digital wireless audio receiver system employing time diversity (2009-06-30),

3. 7551681 - Digital wireless audio transmitter system employing time diversity (2009-06-23),

4. 7289560 - Digital modulation and demodulation technique for reliable wireless (both RF and IR) and wired high bandwidth data transmission (2007-10-30),

5. 7236549 - Digital switching wireless receiver diversity and buffer diversity for enhanced reception in a wireless digital audio communication system (2007-06-26),

6. 6741659 - Wireless infrared digital audio transmitting system (2004-05-25),

7. 6728585 - Personal on-demand audio entertainment device that is untethered and allows wireless download of content (2004-04-27),

8. 6671325 - Wireless infrared digital audio system (2003-12-30),

9. 6668204 - Biaural (2channel listening device that is equalized in-stu to compensate for differences between left and right earphone transducers and the ears themselves (2003-12-23),

10. 6614849 - Wireless infrared digital audio receiving system (2003-09-02),

11. 6614024 - Infra-red wireless receiver with novel shielding and IR front end signal enhancement (2003-09-02),

12. 6510182 - Wireless infrared digital audio system (2003-01-21),

Freesystems Pte Ltd is a leading provider of innovative technology solutions, specializing in software development and IT consulting services. With a strong focus on delivering cutting-edge solutions to meet the evolving needs of businesses, Freesystems has established a reputation for excellence and reliability in the industry. Our team of experienced professionals is dedicated to providing customized solutions that drive efficiency and success for our clients. Contact us today to learn more about how Freesystems can help transform your business.

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

Company Badge

USPTO Data Jan 1 1976 - Sep 29 2026

12 Patents

#182 in Singapore

#182 in Singapore

#48,090 in the World

Singapore, Singapore

Freesystems Pte Ltd

Forward Citations = 133

9 inventors:

Beng Huat Chua (7 out of 8 patents)

Chee Oei Chan (7 out of 28 patents)

Kah Yong Lee (4 out of 38 patents)

4. Chee Kong Siew (4 out of 9 patents)

5. Chong Lim Neoh (2 out of 5 patents)

Please report any incorrect information to [email protected]

Loading…