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For the Inventor, By the Inventor

Hitachiota, Japan

Hiroshi Hozoji

This inventor holds 62 USPTO granted patents and 6 published patent applications and 7 EPO patents, primarily in Power Conversion Technology (CPC class H01L). Top assignees: Hitachi, Ltd., Renesas Technology Corp., Hitachi Automotive Systems, Ltd.. Active years: 1991-2021.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Hiroshi Hozoji. Retrieved from https://idiyas.com/inventor/hiroshi-hozoji

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

USPTO Granted Patents = 62 

% Patents Active = 66.1

 

Average Co-Inventor Count = 6.9

ph-index = 15

Forward Citations = 751(Granted Patents)

Forward Citations (Not Self Cited) = 731(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Hitachi-shi, Ibaragi, JP (2003)
  • Hitachi, JP (1991 - 2005)
  • Yokohama, JP (2003 - 2006)
  • Hitachiohta, JP (2004 - 2010)
  • Tokyo, JP (2015 - 2020)
  • Hitachiota, JP (2004 - 2021)

Company Filing History:

goldMedal46 out of 42,726 
 
Hitachi, Ltd.
 patents
silverMedal7 out of 3,781 
 
Renesas Technology Corp.
 patents
bronzeMedal6 out of 2,028 
 
Hitachi Automotive Systems, Ltd.
 patents
4. 1 out of 1,487 
 
Hitachi Astemo Ltd.
 patents
5. 1 out of 2,333 
 
Hitachi Metals, Ltd.
 patents
6. 1 out of 834,453 
Other
 patents

Years Active: 1991-2021

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Areas of Expertise:
Power Module
Power Converter
Semiconductor Device
Electronic Control
Wiring Material
Inverter
Bonding Method
Low Temperature Bonding
Resin-Sealed Device
Multi-Chip Module
Fabrication Method
Electrical System
62 patents (USPTO):Explore Patents
1. 11139748 - Power module, power converter device, and electrically powered vehicle (2021-10-05),
2. 10580561 - Transformer and power converter (2020-03-03),
3. 10559509 - Insulating substrate and semiconductor device using same (2020-02-11),
4. 10348214 - Power module, power converter device, and electrically powered vehicle (2019-07-09),
5. 9729076 - Power module, power converter device, and electrically powered vehicle (2017-08-08),
6. 9407163 - Power module, power converter device, and electrically powered vehicle (2016-08-02),
7. 9373558 - Resin-sealed electronic control device (2016-06-21),
8. 8975747 - Wiring material and semiconductor module using the same (2015-03-10),
9. 8946567 - Power module, power converter device, and electrically powered vehicle (2015-02-03),
10. 8847374 - Power semiconductor module and manufacturing method thereof (2014-09-30),
11. 8821768 - Bonding method and bonding material using metal particle (2014-09-02),
12. 8821676 - Low temperature bonding material comprising coated metal nanoparticles, and bonding method (2014-09-02),
13. 8723306 - Power semiconductor unit, power module, power semiconductor unit manufacturing method, and power module manufacturing method (2014-05-13),
14. 8472188 - Semiconductor power module, inverter, and method of manufacturing a power module (2013-06-25),
15. 8313983 - Fabrication method for resin-encapsulated semiconductor device (2012-11-20),

Title: Inventor Spotlight: Hiroshi Hozoji, Innovating in Power Modules and Transformers

Introduction:

Meet Hiroshi Hozoji, an esteemed inventor hailing from Hitachiota, Japan, renowned for his remarkable contributions to the field of power electronics. With an impressive portfolio of 62 patents under his belt, Hozoji-san has been a driving force behind groundbreaking innovations in power module design, power converters, and electrically powered vehicles.

Latest Patents:

Among his latest patents is a cutting-edge Power Module that features a double-sided electrode module, a power semiconductor element, base plates, and a unique connecting member. This design, molded with resin material, enhances performance and durability in various applications. Additionally, his Transformer and Power Converter patent showcases advancements in core design, heat dissipation, and size reduction, setting new standards in transformer technology.

Career Highlights:

Throughout his illustrious career, Hiroshi Hozoji has made significant contributions to renowned companies such as Hitachi, Ltd. and Renesas Technology Corp. His expertise and innovative spirit have led to the development of transformative technologies that power diverse industries and shape the future of electronics.

Collaborations:

In his collaborative endeavors, Hozoji-san has worked closely with esteemed colleagues such as Asao Nishimura and Masatsugu Ogata, pooling their collective expertise to drive innovations and push the boundaries of traditional power electronics.

Conclusion:

In conclusion, Hiroshi Hozoji stands as a visionary inventor at the forefront of power electronics, consistently pushing the envelope of innovation with his groundbreaking patents and contributions. His dedication to advancing technology and improving efficiency underscores his status as a true pioneer in the field.

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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