Enter assignee name

Trademarks = 1

Forward Citations = 138

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4 inventors (with patents filed for the assignee):

Eric G Suder (15 out of 16 patents)

Harold E A Hansen, Ii (12 out of 13 patents)

Harold E Hansen (2 out of 3 patents)

4. Harold E Hansen Ii (1 out of 1 patent)

15 patents: Sort by Forward Citations

1. 8538002 - Telephone system (2013-09-17),

2. 8391298 - Phone directory in a voice over IP telephone system (2013-03-05),

3. 8194845 - Telephone system (2012-06-05),

4. 7860083 - Shared knowledge in a telephone system (2010-12-28),

5. 7826440 - Quality of service in a remote telephone (2010-11-02),

6. 7421066 - Telephone call/voice processing system (2008-09-02),

7. RE39722 - Telephone call/voice processing system (2007-07-09),

8. 7221741 - Dialing using caller ID (2007-05-22),

9. 7123699 - Voice mail in a voice over IP telephone system (2006-10-17),

10. 7068684 - Quality of service in a voice over IP telephone system (2006-06-27),

11. 6940962 - Dial on-hold (2005-09-06),

12. 6925167 - Service observing in a voice over IP telephone system (2005-08-02),

13. 6842505 - Communications system enhanced with human presence sensing capabilities (2005-01-11),

14. 6252944 - Telephone call/voice processing system (2001-06-26),

15. 6067349 - Dialing using caller ID (2000-05-23),

Estech Systems, Inc. (ESI) is a leading provider of communication solutions for businesses. With over 30 years of experience, ESI offers a comprehensive suite of IP phone systems, unified communications, and cloud services. Their innovative solutions help organizations improve productivity, streamline communication, and enhance customer experience. ESI's commitment to delivering reliable and feature-rich communication platforms has earned them a strong reputation in the industry.

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

Company Badge

USPTO Data Jan 1 1976 - Jan 13 2026

15 Patents

#64 in Plano, TX

#1,272 in Texas

#20,460 in US

#38,781 in the World

Plano, TX, United States of America

Estech Systems, Inc.

Forward Citations = 138

4 inventors:

Eric G Suder (15 out of 16 patents)

Harold E A Hansen, Ii (12 out of 13 patents)

Harold E Hansen (2 out of 3 patents)

4. Harold E Hansen Ii (1 out of 1 patent)

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