This inventor holds 1 USPTO granted patent. Top assignee: Sumitomo Electric Hardmetal Corp.. Active years: 2026.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2026
Title: Eiji Yamamoto: Inventor in Cemented Carbide Technology.
Introduction
Eiji Yamamoto is an inventor based in Itami, Japan. His patent work concerns cemented carbide materials and molds used in ultra-high-pressure generating devices.
Latest Patents
The provided information lists one patent associated with Yamamoto: “Cemented Carbide and Mold for Ultra-High Pressure Generating Device Using the Same.” The invention describes cemented carbide made from tungsten carbide grains and a cobalt-containing second phase, with specified chromium and vanadium proportions. It also sets limits for the second phase’s area ratio and number, measured through image processing of a scanning electron microscope image of a cross section. The record lists 1 patent.
Career Highlights
Yamamoto is associated with Sumitomo Electric Hardmetal Corp. His listed patent reflects work on material composition and microstructure for cemented carbide used in high-pressure equipment.
Collaborations
The provided information names Syunsuke Yamanaka and Kazuhiro Hirose as Yamamoto’s coworkers. Their specific roles in the patent or related work are not stated.
Conclusion
Eiji Yamamoto’s listed invention focuses on carefully controlled cemented carbide composition and structure for molds used in ultra-high-pressure generating devices.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile