This inventor holds 3 USPTO granted patents and 3 published patent applications. Top assignee: Matsushita Electric Industrial Co., Ltd.. Active years: 1976-1980.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Location History:
- Ikoma, JA (1976)
- Ikoma, JP (1980)
Company Filing History:
Years Active: 1976-1980
Title: Seiji Fujisawa - Innovator in Gas-Shielded Arc Welding
Introduction
Seiji Fujisawa is an inventor based in Chiyoda-ku, Tokyo, Japan. He has made significant contributions to the field of welding technology, particularly through his innovative approaches to gas-shielded arc welding methods. Although he currently holds no granted patents, his work is noteworthy for its technical depth and potential applications in the industry.
Latest Patent Applications
Fujisawa's latest patent application is titled "GAS-SHIELDED ARC WELDING METHOD, WELDED JOINT, AND METHOD FOR PRODUCING WELDED JOINT." This application discloses a gas-shielded arc welding method that involves joining steel materials through narrow-gap multilayer welding. The method specifies that the groove angle θ between the steel materials should be 20° or less, with a root gap G ranging from 7 to 15 mm. The root pass is performed in a single pass using a ceramic-made backing material, with a welding current I between 250 to 400 A and a welding voltage V between 25 to 45 V. Additionally, the value [Q/G], which is derived from a prescribed formula, is controlled within a range of 0.32 to 0.70.
Conclusion
Seiji Fujisawa's innovative approach to gas-shielded arc welding showcases his commitment to advancing welding technology. His contributions, although not yet reflected in granted patents, hold promise for future developments in the field.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile