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For the Inventor, By the Inventor

Shimonoseki, Japan

Ryujiro Shitamatsu

This inventor holds 5 USPTO granted patents. Top assignee: Kabushiki Kaisha Kobe Seiko Sho. Active years: 1983-1984.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Ryujiro Shitamatsu. Retrieved from https://idiyas.com/inventor/ryujiro-shitamatsu

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

USPTO Granted Patents = 5

% Patents Active = 100.0

Average Co-Inventor Count = 5.0

ph-index = 2

Forward Citations = 13(Granted Patents)


Company Filing History:

goldMedal5 out of 1,101 
 
Kabushiki Kaisha Kobe Seiko Sho
 patents

Years Active: 1983-1984

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5 patents (USPTO):Explore Patents
1. 4425062 - Cutting and chamfering apparatus for opposing ends of tubular material (1984-01-10),
2. 4398552 - Apparatus for pickling the inner wall of tubular material (1983-08-16),
3. 4397328 - Cleaning apparatus of tubular materials for use in pickling facilities (1983-08-09),
4. 4392506 - Apparatus for conveying tubular materials in pickling facilities of the (1983-07-12),
5. 4392267 - Apparatus for continuously pickling the outer surfaces of tubular (1983-07-12),

Title: Ryujiro Shitamatsu: Innovator in Tubular Material Processing

Introduction

Ryujiro Shitamatsu is a notable inventor based in Shimonoseki, Japan. He has made significant contributions to the field of tubular material processing, holding a total of 5 patents. His innovative designs focus on improving the efficiency and accuracy of various manufacturing processes.

Latest Patents

One of his latest patents is a cutting and chamfering apparatus for opposing ends of tubular material. This apparatus includes a cutting and chamfering support that holds the tubular member horizontally, with two tables positioned at opposite ends. Each table is equipped with a cutting machine and a chamfering machine, allowing for precise processing of the material.

Another significant patent is for an apparatus designed for pickling the inner wall of tubular material. This apparatus is particularly useful for zirconium or zircaloy tubular members, which serve as cladding tubes for nuclear fuel. It utilizes ultrasonic instruments to measure the inner diameter of the tubular member while simultaneously pickling its inner wall. The design features an interlocked mechanism that stops the supply of pickling liquid once the inner diameter reaches a predetermined value, enhancing both efficiency and accuracy.

Career Highlights

Ryujiro Shitamatsu is associated with Kabushiki Kaisha Kobe Seiko Sho, a company known for its advancements in manufacturing technologies. His work has significantly impacted the industry, particularly in the processing of tubular materials.

Collaborations

He has collaborated with notable coworkers, including Kazuo Akagi and Yoshiro Tanaka, contributing to various innovative projects and enhancing the capabilities of their team.

Conclusion

Ryujiro Shitamatsu's contributions to the field of tubular material processing through his patents and collaborative efforts highlight his role as a key innovator. His work continues to influence manufacturing practices and improve efficiency in the industry.

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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