Inagi, Japan

Katsumi Hirai

This inventor holds 6 USPTO granted patents. Top assignees: Kabushiki Kaisha Toshiba, Tokyo Shibaura Denki Kabushiki Kaisha. Active years: 1982-2006.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Katsumi Hirai. Retrieved from https://idiyas.com/inventor/katsumi-hirai

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 = 2.7

ph-index = 5

Forward Citations = 102(Granted Patents)


Location History:

  • Tokyo, JP (2000 - 2003)
  • Inagi, JP (1982 - 2006)

Company Filing History:


Years Active: 1982-2006

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6 patents (USPTO):Explore Patents

Title: Innovations of Katsumi Hirai

Introduction

Katsumi Hirai is a notable inventor based in Inagi, Japan. He has made significant contributions to the field of mobile communication technology, holding a total of 6 patents. His work primarily focuses on enhancing the efficiency and reliability of mobile radio terminal equipment.

Latest Patents

Hirai's latest patents include advancements in CDMA system mobile radio terminal equipment. One of his inventions involves a system where one antenna receives a signal, and a handoff determination mechanism monitors Ec/Io to assess whether a handoff condition is met. When this condition is satisfied, a switching control mechanism transitions the reception to another antenna. This innovation ensures seamless communication during handoff conditions. Another patent details a CDMA mobile terminal apparatus that classifies reception quality into different categories, allowing for effective handover processing based on the quality of the synchronized pilot channel.

Career Highlights

Throughout his career, Katsumi Hirai has worked with prominent companies such as Toshiba Corporation and Tokyo Shibaura Electric Co., Ltd. His experience in these organizations has contributed to his expertise in mobile communication technologies.

Collaborations

Hirai has collaborated with notable colleagues, including Hiroshi Kobayashi and Hiroyuki Ibe, further enhancing the innovative landscape of mobile technology.

Conclusion

Katsumi Hirai's contributions to mobile communication through his patents and collaborations have significantly impacted the industry. His work continues to influence advancements in mobile technology, ensuring better connectivity and communication for users worldwide.

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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