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For the Inventor, By the Inventor

Nagoya, Japan

Naofumi Yamamura

This inventor holds 12 USPTO granted patents and 3 published patent applications and 7 EPO patents. Top assignee: Ngk Spark Plug Company, Limited. Active years: 2012-2017.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Naofumi Yamamura. Retrieved from https://idiyas.com/inventor/naofumi-yamamura

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

USPTO Granted Patents = 12 

% Patents Active = 16.7

 

Average Co-Inventor Count = 3.7

ph-index = 2

Forward Citations = 12(Granted Patents)


Location History:

  • Aichi, JP (2013)
  • Aichi-ken, JP (2014)
  • Nagoya, JP (2012 - 2017)

Company Filing History:

goldMedal12 out of 2,606 
 
Ngk Spark Plug Company, Limited
 patents

Years Active: 2012-2017

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12 patents (USPTO):Explore Patents
1. 9716370 - Spark plug (2017-07-25),
2. 9453490 - Connection device, igniter and ignition system (2016-09-27),
3. 8987990 - Plasma jet spark plug and ignition system (2015-03-24),
4. 8853930 - Ignition plug and method of manufacturing the same (2014-10-07),
5. 8853929 - Plasma jet ignition plug (2014-10-07),
6. 8536770 - Plasma jet spark plug (2013-09-17),
7. 8528531 - Ignition apparatus of plasma jet ignition plug (2013-09-10),
8. 8264132 - Plasma jet ignition plug (2012-09-11),
9. 8253312 - Plasma jet spark plug (2012-08-28),
10. 8237342 - Plasma jet ignition plug and manufacturing method thereof (2012-08-07),
11. 8198790 - Plasma jet ignition plug (2012-06-12),
12. 8196557 - Plasma-jet spark plug and ignition system (2012-06-12),

Title: Naofumi Yamamura: Innovator in Spark Plug Technology

Introduction

Naofumi Yamamura is a prominent inventor based in Nagoya, Japan. He has made significant contributions to the field of spark plug technology, holding a total of 12 patents. His innovative designs have improved the efficiency and functionality of ignition systems.

Latest Patents

Yamamura's latest patents include a novel spark plug design that features a metal shell, an insulator, a center electrode, and a ground electrode. This design incorporates a projection with a columnar shape that forms the discharge gap, enhancing performance. Additionally, he has developed a connection device for ignition plugs that effectively connects two power supplies while suppressing noise through the use of diodes and inductors.

Career Highlights

Yamamura is currently employed at NGK Spark Plug Company, Limited, where he continues to innovate and refine spark plug technology. His work has been instrumental in advancing the capabilities of ignition systems in various applications.

Collaborations

Throughout his career, Yamamura has collaborated with notable colleagues such as Hiroyuki Kameda and Daisuke Nakano. These partnerships have fostered a creative environment that has led to groundbreaking advancements in their field.

Conclusion

Naofumi Yamamura's contributions to spark plug technology exemplify his dedication to innovation and excellence. His patents and collaborative efforts continue to shape the future of ignition systems.

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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