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For the Inventor, By the Inventor

Tokyo, Japan

Heitaro Nakajima

This inventor holds 5 USPTO granted patents. Top assignee: Sony Corporation. Active years: 1979-2002.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Heitaro Nakajima. Retrieved from https://idiyas.com/inventor/heitaro-nakajima

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

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 3.3

ph-index = 4

Forward Citations = 74(Granted Patents)


Location History:

  • Tokyo, JP (1979 - 1998)
  • Toyko, JP (2002)

Company Filing History:

goldMedal5 out of 58,145 
 
Sony Corporation
 patents

Years Active: 1979-2002

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5 patents (USPTO):Explore Patents
1. 6344940 - Method and apparatus for adding 1/f fluctuation to an audio signal (2002-02-05),
2. 5832088 - Method and apparatus for preventing data copying from a disk using data (1998-11-03),
3. 5111442 - Recordable optical disc storage device with limited storage capacity, (1992-05-05),
4. 4445150 - Recording in a single track visual signals associated with audio signals (1984-04-24),
5. 4138121 - Tone arm assembly (1979-02-06),

Title: Heitaro Nakajima: Innovator in Digital Signal Processing

Introduction

Heitaro Nakajima is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of digital signal processing, holding a total of 5 patents. His work focuses on enhancing audio signal quality and preventing data copying from disks.

Latest Patents

One of Nakajima's latest patents is a method and apparatus for adding 1/f fluctuation to an audio signal. This invention provides a digital signal reproduction apparatus and method that employs fluctuation in the sampling or quantization process. The goal is to eliminate the lack of depth feeling in digital data, thereby increasing the pleasantness of audio playback. The system utilizes a master clock with 1/f fluctuation generated by a fluctuation function generating circuit, which is supplied to a D/A converter, an aperture circuit, and a low pass filter. This innovative approach allows the D/A converter to add a 1/f fluctuation in the amplitude direction of the analog signal.

Another notable patent by Nakajima is a method and apparatus for preventing data copying from a disk using data. This invention addresses the critical issue of data security and integrity in digital media.

Career Highlights

Heitaro Nakajima is currently employed at Sony Corporation, a leading company in the electronics and entertainment industry. His work at Sony has allowed him to explore and develop cutting-edge technologies in audio and data processing.

Collaborations

Throughout his career, Nakajima has collaborated with talented individuals such as Takaharu Kitada and Hiroshi Ogawa. These collaborations have contributed to the advancement of innovative technologies in their respective fields.

Conclusion

Heitaro Nakajima's contributions to digital signal processing and data security highlight his role as a significant inventor in the technology sector. His innovative patents continue to influence the way audio signals are processed and protected.

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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