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For the Inventor, By the Inventor

Kawasaki, Japan

Masao Hosogai

This inventor holds 6 USPTO granted patents. Top assignee: Fujitsu Corporation. Active years: 1988-2001.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masao Hosogai. Retrieved from https://idiyas.com/inventor/masao-hosogai

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

USPTO Granted Patents = 6

% Patents Active = 100.0

Average Co-Inventor Count = 5.0

ph-index = 3

Forward Citations = 39(Granted Patents)


Company Filing History:

goldMedal6 out of 39,374 
 
Fujitsu Corporation
 patents

Years Active: 1988-2001

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6 patents (USPTO):Explore Patents
1. 6216342 - Method for fabricating a matrix switchboard and connection pin (2001-04-17),
2. 6127634 - Wiring board with an insulating layer to prevent gap formation during (2000-10-03),
3. 6116912 - Matrix switch board used to connect/disconnect switching system-and (2000-09-12),
4. 5886309 - Matrix switch board, connection pin, and method of fabricating them (1999-03-23),
5. 5355282 - Connector structure for modules in electronic apparatus (1994-10-11),
6. 4778393 - Pin board matrix (1988-10-18),

Title: Masao Hosogai: Innovator in Matrix Switchboard Technology

Introduction

Masao Hosogai is a prominent inventor based in Kawasaki, Japan. He has made significant contributions to the field of electrical engineering, particularly in the development of matrix switchboard technology. With a total of 6 patents to his name, Hosogai continues to push the boundaries of innovation.

Latest Patents

Among his latest patents is a method for fabricating a matrix switchboard and connection pin. This invention provides a solution for connecting and disconnecting a switching-system line and a subscriber line. The matrix switchboard is designed with a board made of insulating material, featuring first and second wiring patterns that cross each other, along with through holes at their intersection points. A connection pin inserted into these holes electrically connects the wiring patterns on both sides of the board. Another notable patent is a wiring board structure that includes an insulating layer to prevent gap formation during the etching process. This structure consists of a board made from a material that can be etched, along with a thermally conductive electrically conductive portion and an insulating layer that protects the board during etching.

Career Highlights

Masao Hosogai is currently employed at Fujitsu Corporation, where he applies his expertise in electrical engineering to develop innovative solutions. His work has been instrumental in advancing the technology used in matrix switchboards.

Collaborations

Throughout his career, Hosogai has collaborated with notable colleagues, including Hitoshi Yokemura and Hiroyuki Otaguro. These collaborations have fostered a creative environment that encourages the exchange of ideas and technological advancements.

Conclusion

Masao Hosogai's contributions to matrix switchboard technology exemplify his commitment to innovation and excellence in engineering. His patents reflect a deep understanding of electrical systems and a dedication to improving connectivity 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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