Hachioji, Japan

Shirou Kotake

This inventor holds 1 USPTO granted patent, plus 1 CIPO patent. Top assignee: Kabushiki Kaisha Toshiba. Active years: 1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Shirou Kotake. Retrieved from https://idiyas.com/inventor/shirou-kotake

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 = 2.0

ph-index = 1

Forward Citations = 9(Granted Patents)


Company Filing History:


Years Active: 1993

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1 patent (USPTO):Explore Patents

Title: Shirou Kotake and His ISDN Text Mail System.

Introduction

Shirou Kotake is an inventor associated with Hachioji, Japan, and Kabushiki Kaisha Toshiba, commonly known as Toshiba. His recorded patent concerns a text mail system designed for use with an Integrated Services Digital Network (ISDN).

Latest Patents

Kotake’s listed patent, “Text Mail System Using ISDN and ISDN Communication Terminal Device,” describes a method for managing messages in a mailbox. When an incoming ISDN call arrives, the receiving side randomly generates a pseudo destination subaddress. The system uses that subaddress as a mailbox number to control the storage and retrieval of messages. Because the subaddress is randomly assigned for each incoming call, the approach is intended to improve mail security and confidentiality. The supplied information lists 1 patent for Kotake.

Career Highlights

The available information connects Kotake’s patent work with Toshiba and identifies Hachioji, Japan, as his location. His listed invention applies ISDN addressing features to mailbox management.

Collaborations

Hideki Hayakawa is identified as Kotake’s coworker. The supplied information does not specify their roles or describe particular joint projects.

Conclusion

Shirou Kotake’s listed patent presents an ISDN-based text mail system that uses randomly generated subaddresses to manage mailbox access and support message confidentiality.

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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