Shizuoka, Japan

Masazumi Kobayashi

This inventor holds 40 USPTO granted patents and 4 published patent applications and 14 EPO patents, primarily in Constant Velocity Joints. Top assignee: Ntn Corporation. Active years: 1998-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Masazumi Kobayashi. Retrieved from https://idiyas.com/inventor/masazumi-kobayashi

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

USPTO Granted Patents = 40 

% Patents Active = 85.0

 

Average Co-Inventor Count = 2.7

ph-index = 5

Forward Citations = 98(Granted Patents)


Location History:

  • Shizuoka-ken, JP (2005 - 2010)
  • Iwata, JP (1998 - 2013)
  • Shizuoka, JP (2003 - 2023)

Company Filing History:


Years Active: 1998-2026

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Areas of Expertise:
Constant Velocity Joint
Universal Joint
Manufacturing Method
Outer Joint Member
Drive Shaft
Forging Shaft Member
Inspection Device
Cage Design
Power Transmission
Fixed Type Joint
Plunging Type Joint
Sliding Type Joint
40 patents (USPTO):Explore Patents

Title: Masazumi Kobayashi - Innovator in Propeller Shaft Technology

Introduction

Masazumi Kobayashi is a notable inventor based in Shizuoka, Japan, recognized for his contributions to engineering, particularly in the development of propeller shaft technology. With an impressive portfolio of 37 patents, Kobayashi has made significant advancements in the field.

Latest Patents

Among his latest innovations is the "Plunging Type Constant Velocity Universal Joint for Propeller Shaft," which encompasses a detailed design featuring an outer joint member, an inner joint member, eight torque transmitting balls, and a specialized cage. This design is characterized by a unique configuration where the centers of curvature of the spherical surfaces are offset, contributing to enhanced performance and efficiency. The ratio of the offset to the pitch circle diameter (PCD) of the torque transmitting balls is carefully calibrated, ranging between 0.07 and 0.09, optimizing the joint's functionality.

Career Highlights

Masazumi Kobayashi has been a pivotal part of NTN Corporation, a highly regarded entity in the engineering and manufacturing sector. His work within the company has not only contributed to its reputation but has also positioned him as a leading inventor in the area of mechanical components.

Collaborations

Throughout his career, Kobayashi has collaborated with esteemed colleagues, including Tatsuro Sugiyama and Tomoshige Kobayashi. Together, they have worked on projects that enhance the capabilities of mechanical systems, thereby driving innovation within the industry.

Conclusion

Masazumi Kobayashi's dedication to innovation is evident through his numerous patents and significant contributions to propeller shaft technology. His work continues to influence the field, paving the way for further advancements in mechanical engineering and design. As an inventor, he exemplifies the spirit of creativity and professionalism that drives progress in the technological landscape.

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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