Company Filing History:

14 out of 1,438

3com Corporation

patents

1 out of 4

U.S. Robotics Mobile Communications Corp.

patents

1 out of 27,394

Hewlett-packard Development Company, L.p.

patents

Years Active: 1997-2013

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16 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 8472614 - Attenuation and termination circuit using impedance synthesis (2013-06-25),

2. 7660408 - Attenuation and termination circuit using impedance synthesis (2010-02-09),

3. 6859051 - Systems and methods for impedance synthesis (2005-02-22),

4. 6700387 - Systems and methods for impedance synthesis (2004-03-02),

5. 6697485 - Data signal attenuator and systems and methods for using same (2004-02-24),

6. 6654461 - Synthesized telephone line ring signal impedance termination (2003-11-25),

7. 6573729 - Systems and methods for impedance synthesis (2003-06-03),

8. 6567472 - System and method for terminating a line by reflecting a scaled impedance (2003-05-20),

9. 6542358 - Retractable platform with wireless electrical interface (2003-04-01),

10. 6456665 - Partial modification of a nominal impedance using digital impedance synthesis (2002-09-24),

11. 6377667 - Telephone line-assist powered apparatus with programmable hold current (2002-04-23),

12. 6338077 - Transfer function implementation using digital impedance synthesis (2002-01-08),

13. 6307880 - Method and system for externally incorporating automatic switching between voice and data communications (2001-10-23),

14. 6283773 - Media jack with external fuse access (2001-09-04),

15. 6219732 - Apparatus and method for wireless communication between a host and a selectively removable module electrically connected to the host (2001-04-17),

Title: The Innovations of John P Evans

Introduction

John P Evans is a notable inventor based in Riverton, UT (US). He has made significant contributions to the field of telecommunications, holding a total of 16 patents. His work primarily focuses on circuits that enhance signal processing in telephone networks.

Latest Patents

One of his latest patents is titled "Attenuation and termination circuit using impedance synthesis." This invention discloses circuits designed to isolate and attenuate signals generated by a telephone network. In the disclosed embodiments, a metering pulse signal is isolated from the terminals of the connecting device and then attenuated with an impedance synthesized using a programmable digital signal processor. The invention also utilizes the digital signal processor to synthesize a termination impedance for the connecting device. This termination impedance closely matches the characteristic impedance of the network, minimizing wave reflections and enhancing signal integrity.

Career Highlights

Throughout his career, John P Evans has worked with several prominent companies, including 3Com Corporation and U.S. Robotics Mobile Communications Corp. His experience in these organizations has allowed him to develop and refine his innovative ideas in telecommunications.

Collaborations

John has collaborated with notable professionals in his field, including Spiro Poulis and Shayne Messerly. These collaborations have contributed to the advancement of his inventions and the overall progress in telecommunications technology.

Conclusion

John P Evans is a distinguished inventor whose work has significantly impacted the telecommunications industry. His innovative patents and collaborations reflect his dedication to enhancing signal processing technologies.

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