This inventor holds 32 USPTO granted patents, primarily in Optical Isolators. Top assignees: Shin-Etsu Chemical Co., Ltd., Nippon Hoso' Kyokai, Other. Active years: 1985-2003.
Location History:
- Usuigun, JP (1991)
- Gunma-ken, JP (1997 - 2000)
- Gunma, JP (1985 - 2001)
- Annaka, JP (1999 - 2003)
Company Filing History:
31 out of 5,989 
2 out of 382 
1 out of 834,411 Years Active: 1985-2003
Areas of Expertise:
Title: **Toshihiko Ryuo: Innovator in Optical and Piezoelectric Technologies**
Introduction
Toshihiko Ryuo, based in Gunma, Japan, is an accomplished inventor with a remarkable portfolio of 32 patents. His contributions to the fields of optical isolation and piezoelectric technology demonstrate his commitment to innovation and excellence in his work.
Latest Patents
Among Ryuo’s latest inventions are two significant patents:
1. **Polarization-independent optical isolator and production method thereof** - This invention features a polarization-independent optical isolator comprising a first birefringent wedge plate and a second birefringent wedge plate arranged with a Faraday rotator element in between. The design ensures effective light isolation through careful alignment and adhesion of components within a cylindrical magnet.
2. **Piezoelectric single crystal wafer** - In this patent, Ryuo discloses a piezoelectric single crystal wafer with an etching pit density of 7.8×10 /mm or less, optimizing surface roughness and ensuring excellent uniformity of acoustic wave velocities. This innovation addresses both performance and yield issues in the production of devices like filters.
Career Highlights
Toshihiko Ryuo's career includes significant roles at prominent companies such as Shin-Etsu Chemical Co., Ltd. and Nippon Hoso' Kyokai. His experience in these organizations has allowed him to develop a profound understanding of material science and device engineering, which underpins his innovative work.
Collaborations
Throughout his career, Ryuo has collaborated with notable individuals, including Masayuki Tanno and Toshiaki Watanabe. These partnerships have been instrumental in advancing his inventions and bringing cutting-edge technologies to market.
Conclusion
Toshihiko Ryuo stands out as a significant figure in innovation, particularly in optical and piezoelectric technologies. His extensive patent portfolio reflects his dedication to enhancing technology and improving device performance, making him a key player in his field.