Nishinomiya, Japan

Kiyokazu Sakai

This inventor holds 8 USPTO granted patents. Top assignees: Kanzaki Paper Manufacturing Co., Ltd., New Oji Paper Co, Ltd.. Active years: 1989-1997.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kiyokazu Sakai. Retrieved from https://idiyas.com/inventor/kiyokazu-sakai

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


% Patents Active = 100.0

Average Co-Inventor Count = 2.8

ph-index = 6

Forward Citations = 89(Granted Patents)


Location History:

  • Nishinomiya, JP (1989 - 1995)
  • Hyogo, JP (1996 - 1997)

Company Filing History:


Years Active: 1989-1997

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8 patents (USPTO):Explore Patents

Title: Kiyokazu Sakai: Innovator in Optical Measurement Technologies

Introduction

Kiyokazu Sakai is a prominent inventor based in Nishinomiya, Japan. He has made significant contributions to the field of optical measurement technologies, holding a total of eight patents. His work focuses on improving the measurement of optical properties in composite materials.

Latest Patents

Sakai's latest patents include a method and apparatus for measuring the retardation of composite layers. This innovation involves the use of a compensation polarizing plate that enhances the polarization characteristics of a composite layer sample. By ensuring that the polarization transmission axes of the polarizing filter layer and the compensation polarizing plate are parallel, Sakai's method effectively compensates for insufficient polarization. Another notable patent is a method and apparatus for measuring birefringence. This technique utilizes a phase plate adjusted to achieve a specific phase difference, allowing for accurate measurement of retardation even at higher orders.

Career Highlights

Throughout his career, Kiyokazu Sakai has worked with notable companies such as Kanzaki Paper Manufacturing Co., Ltd. and New Oji Paper Co., Ltd. His experience in these organizations has contributed to his expertise in optical technologies and measurement techniques.

Collaborations

Sakai has collaborated with several professionals in his field, including Shigeyoshi Osaki and Shinichi Nagata. These partnerships have furthered his research and development efforts in optical measurement.

Conclusion

Kiyokazu Sakai is a distinguished inventor whose work in optical measurement technologies has led to significant advancements in the field. His innovative patents and collaborations reflect his commitment to enhancing the understanding of optical properties in materials.

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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