This inventor holds 1 USPTO granted patent. Top assignee: Nippondenso Co., Ltd.. Active years: 1988.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile
Company Filing History:
Years Active: 1988
Title: Hirofumi Iwata: Inventor of a Chord-Sound Warning Apparatus.
Introduction
Hirofumi Iwata is an inventor associated with Hashima, Japan, and Nippondenso Co., Ltd. His recorded patent describes an electronic warning apparatus designed to produce chord sounds using piezoelectric elements.
Latest Patents
Iwata is credited with 1 patent: “Warning Chord Sound Producing Apparatus Including an Integrated Circuit.” The invention uses a clock-driven, 1-bit microcomputer with two output ports to control transistors and step-up transformers. The transformers drive piezoelectric sounding devices. A program stored in the microcomputer generates two square-wave pulse trains with different basic frequencies, combining their tones to produce a chord sound.
Career Highlights
Iwata’s documented patent work reflects an application of microcomputer control and piezoelectric components to warning-sound technology. The patent is associated with Nippondenso Co., Ltd., now known as DENSO Corporation.
Collaborations
The provided information lists Toru Nakashima and Haruhiko Inoue as Iwata’s coworkers. It does not specify whether they collaborated with him on this patent.
Conclusion
Hirofumi Iwata’s recorded invention combines programmed electronic signals and piezoelectric sounders to create chord-based warnings, illustrating his contribution to warning-device technology.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile