logo

For the Inventor, By the Inventor

Aizuwakamatsu, Japan

Junichi Kumagai

This inventor holds 5 USPTO granted patents. Top assignee: Mitsubishi Shindoh Co., Ltd.. Active years: 1995-2009.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Junichi Kumagai. Retrieved from https://idiyas.com/inventor/junichi-kumagai

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 = 3.4

ph-index = 3

Forward Citations = 21(Granted Patents)


Company Filing History:

goldMedal5 out of 71 
 
Mitsubishi Shindoh Co., Ltd.
 patents

Years Active: 1995-2009

Loading Chart...
5 patents (USPTO):Explore Patents
1. 7485200 - Copper alloy and method of manufacturing the same (2009-02-03),
2. 7338631 - Copper alloy and method of manufacturing the same (2008-03-04),
3. 5997810 - High-strength copper based alloy free from smutting during pretreatment (1999-12-07),
4. 5885376 - Corrosion-resistant high-strength copper based alloy having excellent (1999-03-23),
5. 5463247 - Lead frame material formed of copper alloy for resin sealed type (1995-10-31),

Title: Junichi Kumagai: Innovator in Copper Alloy Technology

Introduction

Junichi Kumagai is a notable inventor based in Aizuwakamatsu, Japan. He has made significant contributions to the field of materials science, particularly in the development of advanced copper alloys. With a total of five patents to his name, Kumagai's work is recognized for its innovative approach and practical applications.

Latest Patents

One of Kumagai's latest patents focuses on a copper alloy and the method of manufacturing it. This copper alloy contains at least zirconium in an amount of not less than 0.005% by weight and not greater than 0.5% by weight. The alloy includes a first grain group with grains having a size of not greater than 1.5 μm, a second grain group with grains sized between 1.5 μm and 7 μm, and a third grain group with grains of at least 7 μm. The grains in the second group are elongated in one direction. Additionally, the patent specifies that the sum of α and β must be greater than γ, with α being the total area ratio of the first grain group, β the total area ratio of the second grain group, and γ the total area ratio of the third grain group, based on a unit area, where α + β + γ = 1.

Career Highlights

Kumagai is currently employed at Mitsubishi Shindoh Co., Ltd., where he continues to innovate in the field of materials. His work has not only advanced the understanding of copper alloys but has also contributed to the practical applications of these materials in various industries.

Collaborations

Throughout his career, Kumagai has collaborated with notable colleagues, including Rensei Futatsuka and Takeshi Suzuki. These collaborations have further enriched his research and development efforts, leading to groundbreaking advancements in alloy technology.

Conclusion

Junichi Kumagai stands out as a prominent inventor in the field of copper alloy technology. His innovative patents and contributions to Mitsubishi Shindoh Co., Ltd. highlight his commitment to advancing materials science. His work continues to influence the industry and pave the way for future innovations.

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]
Loading…