Location History:
- Urawa, JA (1977)
- Urawa, JP (1979)
- Sagamihara, JP (1984)
- Tokyo, JP (1983 - 1999)
- Kanagawa, JP (1993 - 2002)
- Saitama, JP (1983 - 2020)
Company Filing History:
8 out of 58,132 
3 out of 186 
1 out of 631 Years Active: 1977-2020
Title: Hiroyuki Yamauchi: Innovator in Crystal Technology and Wireless Communication
Introduction
Hiroyuki Yamauchi is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the fields of crystal technology and wireless communication. With a total of 12 patents to his name, Yamauchi's work has had a lasting impact on various technological advancements.
Latest Patents
Yamauchi's latest patents include an AT-cut crystal element and a crystal resonator. This AT-cut crystal element is designed to reduce unnecessary vibration and improve the impedance of a resonator. The design features two side surfaces that intersect with the Z'-axis of the crystallographic axis of the crystal, consisting of three surfaces: a first surface as an m-surface of quartz crystal, a second surface that intersects with the first surface, and a third surface that intersects with the second surface. The second surface corresponds to a surface obtained by rotating a principal surface of the AT-cut crystal element by -74±3° around the X-axis of the crystal, while the third surface is obtained by rotating the principal surface by -56±3° around the same axis.
Another notable patent is for a wireless communication device that includes a reconfigurable matching circuit. This innovation allows for the recording of original image data before compression on a recording medium. It enables quick real-time coding during a second coding process from that medium. The device utilizes a VTR to reproduce video data from a master video tape, where the first coding processing is performed. The bit rate and allocation data obtained from this processing are stored in a predetermined region of the master video tape, facilitating rapid second coding processing without needing to read data from another apparatus.
Career Highlights
Throughout his career, Yamauchi has worked with notable companies, including Sony Corporation and Niles Parts Company, Ltd. His experience in these organizations has contributed to his expertise in developing innovative technologies.
Collaborations
Yamauchi has collaborated with esteemed colleagues such as Kenkichi Umeda and Seiichi Furuya. Their joint efforts have further advanced the field of crystal technology and wireless communication.
Conclusion
Hiroyuki Yamauchi's contributions to technology through his patents and collaborations highlight his role as a leading inventor in his field. His work continues to influence advancements in crystal technology and wireless communication.