This inventor holds 1 USPTO granted patent and 2 published patent applications. Top assignee: Daido Steel Co., Ltd.. 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: Hiroki Yamamoto and a γ′-Strengthened Steel Seal Member
Introduction
Hiroki Yamamoto is an inventor associated with Tokyo, Japan, and Daido Steel Co., Ltd. His work includes a patent for a seal member made from a γ′ precipitation-hardening alloy.
Latest Patents
Yamamoto is credited with 1 patent, titled “Seal Member and Method for Manufacturing Same.” The invention describes a seal member made from a γ′ precipitation-hardening alloy with specified ranges of nickel, chromium, titanium, aluminum, niobium, tantalum, boron, tungsten, and molybdenum, alongside optional additions and limits for carbon, silicon, manganese, phosphorus, and sulfur. The alloy’s balance consists of iron and inevitable impurities. The seal member has a hardness of at least 250 Hv and a cold-rolled microstructure.
Career Highlights
Yamamoto’s listed patent focuses on alloy composition and cold-rolling processes for producing a hardened seal member. He is associated with Daido Steel Co., Ltd., a company working in the steel industry.
Collaborations
Yoshiki Kumagai is identified as Yamamoto’s coworker. The available information does not specify whether Kumagai collaborated on the patent.
Conclusion
Hiroki Yamamoto’s recorded invention concerns a γ′ precipitation-hardening alloy seal member designed to combine a defined composition with high hardness and a cold-rolled microstructure.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile