Chang Hwa Lee

This inventor holds 9 USPTO granted patents and 1 published patent application. Top assignees: Electronics and Telecommunications Research Institute, Korea Telecommunication Authority. Active years: 1995-2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Chang Hwa Lee. Retrieved from https://idiyas.com/inventor/chang-hwa-lee

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

USPTO Granted Patents = 9 (Patent Applications = 1)

% Patents Active = 100.0

Average Co-Inventor Count = 4.9

ph-index = 4

Forward Citations = 92(Granted Patents)

Location History:

Daeduk-ku, KR (1995)
Taejon, KR (2000 - 2002)
Daejeon, KR (2000 - 2002)

Company Filing History:

9 out of 11,790

Electronics and Telecommunications Research Institute

patents

2 out of 192

Korea Telecommunication Authority

patents

where one patent can have more than one assignee

Years Active: 1995-2002

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9 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 6400239 - Microwave filter with a movable shield having alignment windows (2002-06-04),

2. 6373352 - Duplexer with stepped impedance resonators (2002-04-16),

3. 6356165 - Magnetostatic wave devices for high frequency signal processing (2002-03-12),

4. 6326867 - Dielectric filter having resonators arranged in series (2001-12-04),

5. 6150906 - HF filter using resonators having convex-concave structure (2000-11-21),

6. 6130587 - Microstripline/stripline isolator/circulator having a propeller resonator (2000-10-10),

7. 6060965 - Dielectric resonator and filter including capacitor electrodes on a (2000-05-09),

8. 6054909 - Microwave filter with U-type resonator (2000-04-25),

9. 5450278 - Chip type capacitor for removing radio frequency noise (1995-09-12),

Title: Chang Hwa Lee: Innovator in Microwave Technology

Introduction

Chang Hwa Lee is a prominent inventor based in Taejon, South Korea. He has made significant contributions to the field of microwave technology, holding a total of nine patents. His work focuses on developing advanced communication systems that enhance signal processing and transmission.

Latest Patents

Among his latest patents is a microwave filter with a movable shield featuring alignment windows. Additionally, he has developed a duplexer utilizing stepped impedance resonators. This duplexer comprises open-ended resonators arranged on the front side of a dielectric block and shorted resonators on the rear side. It includes first grooves for controlling receiving coupling at the receiving filter and second grooves for controlling transmitting coupling at the transmitting filter. The design also features a plurality of recesses formed at the bottom of the dielectric block, extending from a first aperture of the open-ended resonators to a second aperture of the shorted resonators. This innovative duplexer is miniaturized by excluding external elements and boasts excellent attenuation characteristics, manufactured through simple processes.

Career Highlights

Chang Hwa Lee has worked with notable organizations such as the Electronics and Telecommunications Research Institute and the Korea Telecommunication Authority. His experience in these institutions has allowed him to refine his expertise in telecommunications and microwave technology.

Collaborations

Some of his coworkers include Sang Seok Lee and Bon Hee Koo, who have collaborated with him on various projects in the field.

Conclusion

Chang Hwa Lee's contributions to microwave technology and his innovative patents have significantly impacted the telecommunications industry. His work continues to influence advancements in communication systems.

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]

1 patent pending: