Tokyo, Japan

Nobuyuki Yamaguchi

This inventor holds 49 USPTO granted patents, primarily in Fishing Reel Technology. Top assignees: Daiwa Seiko, Inc., Oki Electric Industry Co., Ltd., Daiwa Seiko Co., Ltd.. Active years: 1985-2022.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Nobuyuki Yamaguchi. Retrieved from https://idiyas.com/inventor/nobuyuki-yamaguchi

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


% Patents Active = 91.8

Average Co-Inventor Count = 1.6

ph-index = 12

Forward Citations = 478(Granted Patents)


Location History:

  • Higashikurume, JP (1995)
  • Tama, JP (1999 - 2001)
  • Saitama, JP (2004 - 2009)
  • Tokyo, JP (1985 - 2022)

Company Filing History:


Years Active: 1985-2022

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Areas of Expertise:
Fishing Reel
Anti-Reverse Mechanism
Double Bearing
Spinning Reel
Quality Control
Centrifugal Operator
Magnetic Force Control
Wear Indicator
Braking Device
Clutch Mechanism
Fishline Guide
Reciprocating Cam
49 patents (USPTO):Explore Patents

Title: Nobuyuki Yamaguchi: Pioneering Innovations in Capacitors and Communication Systems

Introduction: Nobuyuki Yamaguchi, a distinguished inventor based in Tokyo, Japan, is recognized for his substantial contributions to the field of electronics. With an impressive portfolio of 49 patents, Yamaguchi has significantly impacted the industry through innovative designs and technologies.

Latest Patents: Among his latest patents are remarkable advancements in multi-layer ceramic capacitors and voice packet communications systems. The multi-layer ceramic capacitor patent details a sophisticated design featuring a ceramic body with laminated layers; internal electrodes strategically positioned to ensure superior performance, and a unique facing portion that incorporates specific elemental concentrations to optimize functionality. Additionally, his patent for a voice packet communications system introduces a novel method for real-time evaluation of voice quality. This system processes voice packets, ensures uniformity, and measures the quality of communication based on the detection of packet drop-outs and substitutions.

Career Highlights: Throughout his career, Nobuyuki Yamaguchi has made significant strides in various organizations, including Daiwa Seiko, Inc. and Oki Electric Industry Co., Ltd. His work has contributed not only to the technological advancements of these companies but also to the broader field of electronics and communication systems.

Collaborations: Yamaguchi has collaborated with notable professionals in his field, including Mikiharu Kobayashi and Hiromi Aoyagi. These partnerships have fostered innovation and have been integral to the development of groundbreaking technologies throughout his career.

Conclusion: Nobuyuki Yamaguchi’s relentless pursuit of innovation in capacitor technology and communication systems signifies his status as a leading inventor in the electronics industry. His patents reflect a deep understanding of complex systems and an ability to enhance everyday technology. As he continues to push the boundaries of invention, Yamaguchi stands as an inspiration for future inventors and innovators.

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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