logo

For the Inventor, By the Inventor

Kawasaki, Japan

Sou Ishika

This inventor holds 10 USPTO granted patents. Top assignees: Kabushiki Kaisha Toshiba, Other. Active years: 1992-2005.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Sou Ishika. Retrieved from https://idiyas.com/inventor/sou-ishika

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

USPTO Granted Patents = 10

% Patents Active = 90.0

Average Co-Inventor Count = 1.2

ph-index = 5

Forward Citations = 69(Granted Patents)


Location History:

  • Kawasaki, JP (1992 - 1994)
  • Kanagawa-ken, JP (1996 - 1998)
  • Yokohama, JP (2005)

Company Filing History:

goldMedal10 out of 53,276 
 
Kabushiki Kaisha Toshiba
 patents
silverMedal1 out of 834,570 
Other
 patents
where one patent can have more than one assignee

Years Active: 1992-2005

Loading Chart...
10 patents (USPTO):Explore Patents
1. 6956192 - Optical head and optical disk drive (2005-10-18),
2. 5719835 - Light detecting device for receiving light from corresponding portions (1998-02-17),
3. 5559783 - An optical head having a rotating mirror (1996-09-24),
4. 5357102 - Tilted light detection device for preventing undesirable retro-reflection (1994-10-18),
5. 5345432 - Optical head (1994-09-06),
6. 5218524 - Optical disk apparatus (1993-06-08),
7. 5153864 - Focusing detection optical path for an optical information processing (1992-10-06),
8. 5132959 - Optical head in use with an optical recording/reproducing apparatus (1992-07-21),
9. 5105411 - Apparatus for detecting and correcting focusing and tracking errors (1992-04-14),
10. 5105407 - Optical information-processing apparatus (1992-04-14),

Title: The Innovations of Sou Ishika

Introduction

Sou Ishika is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of optical technology, holding a total of 10 patents. His work primarily focuses on advancements in optical head and optical disk drive technologies.

Latest Patents

One of Ishika's latest patents involves an optical head and optical disk drive. This invention features a DVD laser that emits a first light beam, while a CD laser emits a second light beam. An optical diffraction element is utilized to diffract the first and second reflected lights corresponding to these light beams. Additionally, an optical detection element detects the reflected lights from a polarizing beam splitter. The optical axes of the CD and DVD lasers are designed to diverge from each other, allowing for the detection of all necessary reflected light components for focusing and tracking of both CD and DVD formats.

Another notable patent is a light detecting device that receives light from corresponding portions. This device includes an object lens that directs a light beam from a light source to a recording medium. The recording medium features a groove and a header portion formed by interrupting the groove. The light detecting device also comprises a photo-detector that detects the reflected light beam and outputs a signal corresponding to the intensity of the reflected light. The photo-detector is designed with a light beam detecting surface in a specified shape, ensuring that components of the reflected light beam diffracted by the header portion do not interfere with detection.

Career Highlights

Throughout his career, Sou Ishika has worked with notable companies, including Kabushiki Kaisha Toshiba. His experience in the industry has allowed him to develop innovative technologies that have impacted the optical technology landscape.

Collaborations

Ishika has collaborated with several talented individuals, including Akihiro Kasahara and Hideo Yamasaki. These collaborations have contributed to the advancement of his inventions and the overall progress in optical technology.

Conclusion

Sou Ishika's contributions to optical technology through his patents and collaborations highlight his role as an influential inventor in the field. His innovative work continues to shape the future of optical devices and systems.

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]
Loading…