Company Filing History:

9 out of 42,488

Hitachi, Ltd.

patents

1 out of 8

Hitachi Haramachi Electronics Co., Ltd.

patents

where one patent can have more than one assignee

Years Active: 1984-2006

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9 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 7097091 - Friction stir welding method and component part welded by the method (2006-08-29),

2. 6739495 - Friction stir welding method and component part welded by the method (2004-05-25),

3. 6595403 - Friction stir welding method (2003-07-22),

4. 6299050 - Friction stir welding apparatus and method (2001-10-09),

5. 5621243 - Semiconductor device having thermal stress resistance structure (1997-04-15),

6. 5231366 - Superconducting magnetic field generating apparatus and method of (1993-07-27),

7. 5051397 - Joined body of high-temperature oxide superconductor and method of (1991-09-24),

8. 4615658 - Shroud for gas turbines (1986-10-07),

9. 4465530 - Gas turbine nozzle having superior thermal fatigue resistance (1984-08-14),

Title: Masahiko Sakamoto: Innovator in Friction Stir Welding

Introduction

Masahiko Sakamoto is a prominent inventor based in Hitachi, Japan. He has made significant contributions to the field of welding technology, particularly through his innovative methods in friction stir welding. With a total of 9 patents to his name, Sakamoto has established himself as a key figure in advancing welding techniques.

Latest Patents

One of Sakamoto's latest patents is a friction stir welding method and the component part welded by this method. This invention involves welding two members that differ in physical and mechanical properties. The process includes abutting the two members, inserting a pin portion of a rotary tool into one member, and moving the tool along the abutment surfaces. This method allows for plastic flow in the member where the pin is inserted, enabling effective welding through atom diffusion at elevated temperatures and high pressure.

Career Highlights

Throughout his career, Masahiko Sakamoto has worked with notable companies such as Hitachi, Ltd. and Hitachi Haramachi Electronics Co., Ltd. His work has been instrumental in developing advanced welding technologies that are widely used in various industries.

Collaborations

Sakamoto has collaborated with several professionals in his field, including Hisanori Okamura and Kinya Aota. These collaborations have contributed to the success and innovation of his projects.

Conclusion

Masahiko Sakamoto's contributions to friction stir welding have significantly impacted the industry. His innovative methods and collaborations with other professionals highlight his dedication to advancing welding technology.

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