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For the Inventor, By the Inventor

Sagamiko, Japan

Tadao Nagai

This inventor holds 8 USPTO granted patents. Top assignee: Teac Corporation. Active years: 1988-1990.

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

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

Calculating rank
USPTO Granted Patents = 8

% Patents Active = 100.0

Average Co-Inventor Count = 2.5

ph-index = 4

Forward Citations = 45(Granted Patents)


Location History:

  • Sagamiko, JP (1988 - 1989)
  • Saganiko, JP (1990)

Company Filing History:

goldMedal8 out of 1,030 
 
Teac Corporation
 patents

Years Active: 1988-1990

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8 patents (USPTO):Explore Patents
1. 4907099 - Method and apparatus for reproducing an information signal recorded on a (1990-03-06),
2. 4866541 - Erasing of information signal from an optical disk (1989-09-12),
3. 4864423 - Information recording disc and information signal recording apparatus (1989-09-05),
4. 4803677 - Rotary recording medium having a guide track and recording and (1989-02-07),
5. 4802159 - Information recording disc and information signal recording apparatus (1989-01-31),
6. 4797870 - Optical recording and reproducing apparatus (1989-01-10),
7. 4757488 - Rotation control apparatus for constant linear velocity system (1988-07-12),
8. 4754339 - Information recording disc pre-recorded with address and pseudo address (1988-06-28),

Title: Tadao Nagai: Innovator in Optical Signal Reproduction

Introduction

Tadao Nagai is a prominent inventor based in Sagamiko, Japan. He has made significant contributions to the field of optical signal reproduction, holding a total of eight patents. His work has advanced the technology used in information signal reproduction, particularly in optical disks.

Latest Patents

One of Tadao Nagai's latest patents is a method and apparatus for reproducing an information signal recorded on a disc at a high reproducing speed. This innovation involves moving a reproducing light beam across a track where the information signal is recorded. The movement is controlled by a driving signal that is produced a predetermined number of times, allowing for efficient reproduction of the information signal. Another notable patent focuses on the erasing of information signals from an optical disk. This control circuit enables selective erasure of the information signal while preserving critical components such as the vertical blanking interval and address signals.

Career Highlights

Tadao Nagai has dedicated his career to advancing optical technology. His work at Teac Corporation has positioned him as a key figure in the development of innovative solutions for information signal reproduction. His patents reflect a deep understanding of optical systems and their applications.

Collaborations

Throughout his career, Tadao Nagai has collaborated with notable colleagues, including Hirohisa Yamaguchi and Akira Mashimo. These partnerships have contributed to the successful development of various technologies in the field.

Conclusion

Tadao Nagai's contributions to optical signal reproduction have had a lasting impact on the industry. His innovative patents and collaborative efforts continue to influence advancements in 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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