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For the Inventor, By the Inventor

Kyoto, Japan

Fumio Ikegami

This inventor holds 4 USPTO granted patents. Top assignees: Mitsubishi Denki Kabushiki Kaisha, Other. Active years: 1988-1989.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Fumio Ikegami. Retrieved from https://idiyas.com/inventor/fumio-ikegami

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

Calculating rank
USPTO Granted Patents = 4

% Patents Active = 100.0

Average Co-Inventor Count = 4.2

ph-index = 3

Forward Citations = 38(Granted Patents)


Location History:

  • Uji-shi, Kyoro-fu, JP (1988)
  • Uji-shi, Kyoto, JP (1989)
  • Uji-shi, Kyoto-fu, JP (1989)
  • 34-10 Kohatauchihata, Uji-shi, Kyoto-fu, JP (1989)

Company Filing History:

goldMedal4 out of 21,351 
 
Mitsubishi Denki Kabushiki Kaisha
 patents
silverMedal4 out of 834,601 
Other
 patents
where one patent can have more than one assignee

Years Active: 1988-1989

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4 patents (USPTO):Explore Patents
1. 4849990 - Digital communication system (1989-07-18),
2. 4841547 - Digital communication system (1989-06-20),
3. 4807252 - Digital communication system (1989-02-21),
4. 4726038 - Digital communication system (1988-02-16),

Title: Fumio Ikegami: Innovator in Digital Communication Systems

Introduction

Fumio Ikegami is a notable inventor based in Kyoto, Japan. He has made significant contributions to the field of digital communication, holding a total of 4 patents. His work has advanced the understanding and implementation of digital information systems.

Latest Patents

One of Ikegami's latest patents is a digital communication system that utilizes a quaternary information symbol (11, 01, 00, 10). This system employs a double step phase shift, with each step represented by angles of (.pi./4, 3.pi./4, 5.pi./4, 7.pi./4). The innovation allows for a reduction in the number of phase shifts per unit time, decreasing it to half compared to a traditional Δθ/2-DSK system. This advancement also minimizes the expansion of bandwidth, making it a significant contribution to digital communication technology.

Career Highlights

Throughout his career, Fumio Ikegami has worked with prominent companies, including Mitsubishi Electric Corporation. His expertise in digital communication has positioned him as a key figure in the industry, contributing to various technological advancements.

Collaborations

Ikegami has collaborated with notable individuals in his field, including Susumu Yoshida and Tsutomu Takeuchi. These partnerships have fostered innovation and have been instrumental in the development of his patented technologies.

Conclusion

Fumio Ikegami's contributions to digital communication systems highlight his role as an influential inventor. His innovative patents and collaborations have significantly impacted the field, showcasing his dedication to advancing technology.

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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