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For the Inventor, By the Inventor

Zama, Japan

Tetsuo Semba

This inventor holds 7 USPTO granted patents. Top assignee: International Business Machines Corporation. Active years: 1994-2000.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tetsuo Semba. Retrieved from https://idiyas.com/inventor/tetsuo-semba-6uuo7tsd

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

USPTO Granted Patents = 7

% Patents Active = 100.0

Average Co-Inventor Count = 1.4

ph-index = 5

Forward Citations = 66(Granted Patents)


Company Filing History:

goldMedal7 out of 166,351 
 
International Business Machines Corporation
 patents

Years Active: 1994-2000

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7 patents (USPTO):Explore Patents
1. 6052345 - System for compensating for hard sector noise degradation of tracking (2000-04-18),
2. 5936919 - System for compensating for hard sector noise degradation of tracking (1999-08-10),
3. 5768228 - Method and sytem for cancelling optical servo crosstalk in optical disk (1998-06-16),
4. 5760991 - Disk storage unit positioning control for applying DC offsets to a (1998-06-02),
5. 5504726 - Method and apparatus for calibrating focus and tracking error signals in (1996-04-02),
6. 5323368 - Track crossing apparatus and method using the difference between pick-up (1994-06-21),
7. 5317550 - Apparatus and method for track access (1994-05-31),

Title: Tetsuo Semba: Innovator in Optical Data Storage Technology

Introduction

Tetsuo Semba is a notable inventor based in Zama, Japan. He has made significant contributions to the field of optical data storage technology, holding a total of 7 patents. His work focuses on improving the reliability and efficiency of data storage systems.

Latest Patents

One of Semba's latest inventions is a system for compensating for hard sector noise degradation of tracking error signals in an optical data storage system. This innovative system includes a hard sector detection circuit that generates a first output signal in response to detecting a hard sector on a magneto-optical disk. Additionally, a logic circuit generates a second output signal based on the first output signal and a second input signal. Furthermore, a tracking error signal reconstruction circuit generates an approximated tracking error signal in response to a tracking error signal and the second output signal. This invention can be implemented as hardwired circuitry or as a combination of hardware and software in a digital computer.

Career Highlights

Tetsuo Semba is currently employed at International Business Machines Corporation (IBM), where he continues to innovate and develop new technologies. His work has had a lasting impact on the field of optical data storage.

Collaborations

Semba has collaborated with notable coworkers, including Allen Keith Bates and Alan A. Fennema, contributing to various projects and advancements in technology.

Conclusion

Tetsuo Semba's contributions to optical data storage technology through his patents and work at IBM highlight his role as a significant innovator in the field. His inventions continue to influence the development of more efficient data storage solutions.

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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