Yoshiaki Ishigami

This inventor holds 54 USPTO granted patents and 8 published patent applications, primarily in Optical Communication (CPC class G02B). Top assignees: Hitachi Cable, Inc., Hitachi Metals, Ltd.. Active years: 2004-2017.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yoshiaki Ishigami. Retrieved from https://idiyas.com/inventor/yoshiaki-ishigami

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

USPTO Granted Patents = 54 (Patent Applications = 8)

% Patents Active = 18.5

Average Co-Inventor Count = 2.6

ph-index = 9

Forward Citations = 360(Granted Patents)

Forward Citations (Not Self Cited) = 341(Dec 10, 2025)

Inventors with similar research interests:

Location History:

Tokyo, JP (2004 - 2015)
Hitachi, JP (2006 - 2017)

Company Filing History:

Years Active: 2004-2017

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Areas of Expertise:

Optical Module

Photoelectric Conversion

Antenna Device

High-Speed Transmission

Communication Module

Signal Transmission

Optical Transceiver

Triplate Line

54 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 9748694 - Connector and connectorized cable (2017-08-29),

2. 9583819 - Antenna device including a phase shifter and a feeding portion configured as a triplate line with a center conductor (2017-02-28),

3. 9570856 - Communication module and communication module connector (2017-02-14),

4. 9559418 - Phase shifter having dielectric members inserted into a movable support frame (2017-01-31),

5. 9548528 - Antenna device (2017-01-17),

6. 9520629 - Phase-shift circuit and antenna device (2016-12-13),

7. 9478910 - Connector and connectorized cable (2016-10-25),

8. 9444198 - Communication module and communication module connector (2016-09-13),

9. 9431718 - Antenna device including triplate line including central conductor and ground plates (2016-08-30),

10. 9429726 - Optical module (2016-08-30),

11. 9373906 - Communication module and communication module connector (2016-06-21),

12. 9360640 - Ferrule fixing member (2016-06-07),

13. 9320170 - Communication module-cooling structure and communication device (2016-04-19),

14. 9293823 - Antenna device (2016-03-22),

15. 9230882 - Signal transmission device (2016-01-05),

Title: The Innovative Mind of Yoshiaki Ishigami

Introduction: Yoshiaki Ishigami, based in Hitachi, Japan, is a notable inventor with a remarkable portfolio of 54 patents. His inventions reflect his contribution to the fields of connectors and antenna devices, showcasing his ingenuity and technical prowess.

Latest Patents: Among Yoshiaki Ishigami's latest inventions are groundbreaking patents that include a new connector designed to prevent disengagement through an innovative locking mechanism. This connector features a housing with a recessed portion that engages with a locking piece, ensuring stability during use. Additionally, his antenna device patent introduces a sophisticated phase shifter and feeding portion structured as a triplate line, facilitating efficient distribution and radiation of high-frequency signals across multiple antenna elements.

Career Highlights: Yoshiaki has built an impressive career through his work at renowned companies such as Hitachi Cable, Inc. and Hitachi Metals, Ltd. His expertise has positioned him as a key contributor within the industry, allowing him to advance technology in practical applications.

Collaborations: Throughout his career, Ishigami has collaborated with prominent colleagues like Yoshinori Sunaga and Kinya Yamazaki, enhancing the scope of his projects and enriching the innovation culture within his teams.

Conclusion: Yoshiaki Ishigami stands as a significant figure in the realm of technology and innovation. His extensive patent portfolio not only reflects his creative genius but also demonstrates his commitment to advancing technology, particularly in the areas of connectivity and high-frequency communication. His work continues to influence future advancements in these fields, securing his legacy as a pioneering inventor.

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]

8 patents pending: