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For the Inventor, By the Inventor

Kawasaki, Japan

Kensaku Fujii

This inventor holds 10 USPTO granted patents, plus 3 CIPO patents. Top assignee: Fujitsu Corporation. Active years: 1990-2004.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kensaku Fujii. Retrieved from https://idiyas.com/inventor/kensaku-fujii

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

Calculating rank
USPTO Granted Patents = 10

% Patents Active = 100.0


Average Co-Inventor Count = 2.9

ph-index = 8

Forward Citations = 254(Granted Patents)


Location History:

  • Yamato, JP (1990 - 1995)
  • Kawasaki, JP (1995 - 2004)

Company Filing History:

goldMedal10 out of 39,378 
 
Fujitsu Corporation
 patents

Years Active: 1990-2004

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10 patents (USPTO):Explore Patents
1. 6683960 - Active noise control apparatus (2004-01-27),
2. 5940499 - Voice switch used in hands-free communications system (1999-08-17),
3. 5790440 - Apparatus for estimating filter coefficients (1998-08-04),
4. 5638311 - Filter coefficient estimation apparatus (1997-06-10),
5. 5602926 - Method and apparatus of determining the sound transfer characteristic of (1997-02-11),
6. 5479502 - Speaking apparatus having handfree conversation function (1995-12-26),
7. 5384843 - Hands-free telephone set (1995-01-24),
8. 5237562 - Echo path transition detection (1993-08-17),
9. 5146470 - Adaptive digital filter including low-pass filter (1992-09-08),
10. 4908855 - Electronic telephone terminal having noise suppression function (1990-03-13),

Title: Innovations by Kensaku Fujii

Introduction

Kensaku Fujii is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of active noise control and hands-free communication systems. With a total of 10 patents to his name, Fujii's work has had a substantial impact on modern technology.

Latest Patents

Fujii's latest patents include an active noise control apparatus designed to transmit secondary noise that cancels out primary noise. This innovative system utilizes an overall system filter to simulate characteristics leading to an error-detecting microphone. Additionally, he has developed a voice switch used in hands-free communication systems. This device performs selective attenuation of voice signals, ensuring clear communication by managing the levels of transmitted and received signals effectively.

Career Highlights

Kensaku Fujii is currently employed at Fujitsu Corporation, where he continues to innovate and develop new technologies. His work has been instrumental in advancing the capabilities of noise control and communication systems, making them more efficient and user-friendly.

Collaborations

Fujii has collaborated with notable coworkers, including Juro Ohga and Hiroyuki Masuda. Their combined expertise has contributed to the successful development of various technologies in their field.

Conclusion

Kensaku Fujii's contributions to technology through his patents and innovations highlight his role as a leading inventor in the industry. His work continues to influence advancements in noise control and communication systems, showcasing the importance of innovation in enhancing everyday experiences.

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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