This inventor holds 4 USPTO granted patents and 1 EPO patent. Top assignee: Yamaha Corporation. Active years: 2022-2024.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 2022-2024
Title: Hiroshi Nakashima: Speaker Diaphragm Innovations
Introduction
Hiroshi Nakashima is an inventor based in Hamamatsu, Japan, whose patent work includes innovations in speaker diaphragms and headphones. He is associated with Yamaha Corporation and holds 4 patents.
Latest Patents
One of Nakashima’s latest patents describes a speaker diaphragm with a mixed layer containing cellulose nanofibers and polyparaphenylenebenzobisoxazole fibers. The specified average length of the latter fibers is between 0.5 and 4.0 millimeters. The patent also identifies a headphone incorporating the diaphragm.
Another patent concerns a speaker diaphragm made from two polymers that undergo phase separation. One polymer is a polyolefin, while the other is an immiscible thermoplastic resin. The materials form a sea phase and dispersed island phases, creating a distinct structure within the diaphragm.
Career Highlights
Nakashima’s patent portfolio reflects work on material composition and structural design for audio components. His inventions explore how fibers and phase-separated polymers can be used in speaker diaphragms.
Collaborations
Nakashima’s listed coworkers include Tsunenori Sano and Kunio Hiyama. His work is associated with Yamaha Corporation.
Conclusion
Hiroshi Nakashima’s patents highlight material-focused approaches to speaker diaphragm design, including fiber-reinforced layers and phase-separated polymers.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile