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For the Inventor, By the Inventor

Cupertino, CA, United States of America

Hungming Chang

This inventor holds 10 USPTO granted patents. Top assignees: Legerity, Inc., Advanced Micro Devices Corporation. Active years: 2000-2003.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hungming Chang. Retrieved from https://idiyas.com/inventor/hungming-chang

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

USPTO Granted Patents = 10

% Patents Active = 100.0

Average Co-Inventor Count = 5.4

ph-index = 5

Forward Citations = 82(Granted Patents)


Company Filing History:

goldMedal7 out of 122 
 
Legerity, Inc.
 patents
silverMedal3 out of 13,175 
 
Advanced Micro Devices Corporation
 patents

Years Active: 2000-2003

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10 patents (USPTO):Explore Patents
1. 6590893 - Adaptive transmission system in a network (2003-07-08),
2. 6577598 - Methods and apparatus for channel adaptation in a DMT based system (2003-06-10),
3. 6456602 - Method and apparatus for achieving frequency diversity by use of multiple images (2002-09-24),
4. 6449262 - Method and apparatus for frequency shifting with a clock signal (2002-09-10),
5. 6434188 - Differential encoding arrangement for a discrete multi-tone transmission system (2002-08-13),
6. 6339599 - Collision handling scheme for discrete multi-tone data communications network (2002-01-15),
7. 6252428 - Method and apparatus for detecting a sinusoidal signal (2001-06-26),
8. 6246267 - Method and apparatus for detecting a sinusoidal signal using a counter and queue (2001-06-12),
9. 6175316 - Bin-to-bin differential encoding apparatus and method for a discrete multi-tone transmission system (2001-01-16),
10. 6075795 - Collision detection system for multiple stations in discrete multi-tone (2000-06-13),

Title: Innovations of Inventor Hungming Chang

Introduction

Hungming Chang is a notable inventor based in Cupertino, California. He holds a total of 10 patents, showcasing his significant contributions to the field of technology and innovation. His work primarily focuses on adaptive transmission systems and channel adaptation methods.

Latest Patents

One of his latest patents is for an adaptive transmission system in a network. This invention involves a network node that can adjust its transmission rate based on current network conditions. Initially, the node transmits data at a first rate, and if errors occur, it reduces the number of data bits in the current packet while increasing redundant data. This process continues until error-free transmission is achieved. Another significant patent is for methods and apparatus for channel adaptation in a discrete multi-tone (DMT) based system. This invention allows multiple nodes to communicate over residential wiring, such as telephone lines, without the need for complex equalizers. By differentially encoding data prior to transmission, the system overcomes amplitude and phase distortion, ensuring effective data recovery.

Career Highlights

Hungming Chang has worked with several prominent companies throughout his career, including Legerity, Inc. and Advanced Micro Devices Corporation. His experience in these organizations has contributed to his expertise in developing innovative technologies.

Collaborations

He has collaborated with notable coworkers such as Chien-Meen Hwang and Eugen Gershon, further enhancing his work in the field of technology.

Conclusion

Hungming Chang's contributions to adaptive transmission systems and channel adaptation methods highlight his innovative spirit and technical expertise. His patents reflect a commitment to improving data communication technologies, making a lasting impact in the industry.

Profile summary based on public USPTO records.
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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