This inventor holds 1 USPTO granted patent. Top assignees: Hitachi Chemical Company, Ltd., Hitachi, Ltd.. Active years: 1984.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
1 out of 1,641 
1 out of 42,760 
Years Active: 1984
Title: Doi Hiroaki: Inventor of Advanced Prepreg Laminates
Introduction
Doi Hiroaki is an inventor associated with Ibaraki, Japan, and with innovations in composite materials. His work includes a patent for a laminate designed to combine low thermal expansion with strong interlaminar bonding.
Latest Patents
Doi’s listed patent, “Laminates Comprising Prepregs Metal Clad,” describes a laminate made by molding multiple prepregs under heat and pressure. The prepregs are formed by impregnating resin into woven or nonwoven composite fabric containing aromatic polyamide fibers and glass fibers. The resulting laminate is designed to have a low linear expansion coefficient and excellent interlaminar strength. His listed portfolio includes 1 patent.
Career Highlights
Doi is associated with Hitachi Chemical Company, Ltd., and Hitachi, Ltd. His patent reflects work on engineered laminates that combine fiber reinforcement and resin for improved material performance.
Collaborations
Doi’s listed coworkers include Yasuo Miyadera and Atsushi Fujioka, reflecting collaborative connections in his professional work.
Conclusion
Doi Hiroaki’s patent highlights his contribution to composite laminate technology, particularly materials designed for dimensional stability and strong interlaminar performance.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile