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For the Inventor, By the Inventor

Osaka, Japan

Kiyotaka Nagai

This inventor holds 9 USPTO granted patents. Top assignee: Matsushita Electric Industrial Co., Ltd.. Active years: 1980-2008.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kiyotaka Nagai. Retrieved from https://idiyas.com/inventor/kiyotaka-nagai

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

USPTO Granted Patents = 9

% Patents Active = 88.9

Average Co-Inventor Count = 3.0

ph-index = 8

Forward Citations = 180(Granted Patents)


Location History:

  • Kawasaki, JP (1980)
  • Hirakata, JP (1986 - 1987)
  • Osaka, JP (1990 - 1992)
  • Nishinomiya, JP (1994 - 2008)

Company Filing History:

goldMedal9 out of 27,375 
 
Matsushita Electric Industrial Co., Ltd.
 patents

Years Active: 1980-2008

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9 patents (USPTO):Explore Patents
1. 7433907 - Signal analyzing method, signal synthesizing method of complex exponential modulation filter bank, program thereof and recording medium thereof (2008-10-07),
2. 5301255 - Audio signal subband encoder (1994-04-05),
3. 5148487 - Audio subband encoded signal decoder (1992-09-15),
4. 5146448 - Time code recording or reproducing apparatus and time code converter (1992-09-08),
5. 5091899 - Time code recording or reproducing apparatus and time code converter (1992-02-25),
6. 4972416 - Error detection and correction method (1990-11-20),
7. 4672665 - Echo canceller (1987-06-09),
8. 4601052 - Voice analysis composing method (1986-07-15),
9. 4224829 - Two-dimensional linear B-scan ultrasound diagnostic apparatus with phase (1980-09-30),

Title: Kiyotaka Nagai: Innovator in Signal Processing

Introduction

Kiyotaka Nagai is a prominent inventor based in Osaka, Japan. He has made significant contributions to the field of signal processing, holding a total of 9 patents. His work focuses on developing methods and technologies that enhance audio signal processing and reduce computational complexity.

Latest Patents

Nagai's latest patents include a signal analyzing method and a signal synthesizing method of complex exponential modulation filter bank. This innovative filter bank is designed to reduce the quantity of arithmetic operations, leading to lower electric power consumption and increased processing speed. The method involves calculating intermediate signals from an input signal using fast Fourier transform techniques, ultimately producing a complex band output signal. Another notable patent is an audio signal subband encoder, which improves sound quality by optimizing the allocation of quantization bits to subband signals. This optimization is based on an evaluation function that combines noise-to-mask ratio and noise-to-signal ratio criteria, effectively minimizing the impact of auditory masking rule errors.

Career Highlights

Kiyotaka Nagai is currently employed at Matsushita Electric Industrial Co., Ltd., where he continues to innovate in the field of signal processing. His work has been instrumental in advancing technologies that are widely used in audio applications.

Collaborations

Nagai has collaborated with notable colleagues such as Yasushi Nakajima and Tatsuya Adachi, contributing to various projects that enhance the capabilities of audio signal processing technologies.

Conclusion

Kiyotaka Nagai's contributions to signal processing through his innovative patents and collaborative efforts have significantly impacted the field. His work continues to pave the way for advancements in audio technology and signal analysis.

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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