Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11773508 | Substrate and light-emitting element | Kazuhito Yamasawa, Katsumi Kawasaki | 2023-10-03 |
| 10458041 | Alumina substrate | Kazuhito Yamasawa, Katsumi Kawasaki | 2019-10-29 |
| 10337120 | Alumina substrate | Kazuhito Yamasawa, Katsumi Kawasaki | 2019-07-02 |
| 10294585 | Alumina substrate | Kazuhito Yamasawa, Katsumi Kawasaki | 2019-05-21 |
| 8815011 | Magnetic garnet single crystal and optical element using same as well as method of producing single crystal | — | 2014-08-26 |
| 8142676 | Magnetic garnet single crystal and optical element using the same | — | 2012-03-27 |
| 7828895 | Method of producing optical element | — | 2010-11-09 |
| 7811465 | Magnetic garnet single crystal and optical element using same as well as method of producing single crystal | — | 2010-10-12 |
| 7758766 | Magnetic garnet single crystal and Faraday rotator using the same | — | 2010-07-20 |
| 7695562 | Magnetic garnet single crystal and method for producing the same as well as optical element using the same | — | 2010-04-13 |
| 7517406 | Magnetic garnet material, faraday rotator, optical device, bismuth-substituted rare earth-iron-garnet single-crystal film and method for producing the same and crucible for producing the same | Tamotsu Sugawara, Kazuhito Yamasawa, Shinichiro Kakei, Kazuya Shimakawa, Katsunori Hosoya | 2009-04-14 |
| 7333261 | Magnetic garnet material, faraday rotator, optical device, bismuth-substituted rare earth-iron-garnet single-crystal film and method for producing the same crucible for producing the same | Tamotsu Sugawara, Kazuhito Yamasawa, Shinichiro Kakei, Kazuya Shimakawa, Katsunori Hosoya | 2008-02-19 |
| 7242516 | Hard magnetic garnet material, faraday rotator, optical device, optical communication system, method of manufacturing faraday rotator and method of manufacturing bismuth-substituted rare earth iron garnet single crystal | Tamotsu Sugawara, Kazuhito Yamasawa | 2007-07-10 |
| 7187496 | Manufacturing method of optical device, optical device, manufacturing method of faraday rotator, and optical communication system | Tamotsu Sugawara | 2007-03-06 |
| 7133189 | Magnetic garnet material, faraday rotator, optical device, bismuth-substituted rare earth-iron-garnet single-crystal film and method for producing the same and crucible for producing the same | Tamotsu Sugawara, Kazuhito Yamasawa, Shinichiro Kakei, Kazuya Shimakawa, Katsunori Hosoya | 2006-11-07 |
| 6875270 | Magnetic garnet single-crystal film and method of producing the same, and Faraday rotator comprising the same | Kazuhito Yamasawa | 2005-04-05 |
| 6853473 | Faraday rotator and optical device comprising the same, and antireflection film and optical device comprising the same | Kenichi Tohchi, Kazuhito Yamasawa, Shinichiro Kakei | 2005-02-08 |
| 6775052 | HARD MAGNETIC GARNET MATERIAL, FARADAY ROTATOR, OPTICAL DEVICE, OPTICAL COMMUNICATION SYSTEM, METHOD OF MANUFACTURING FARADAY ROTATOR AND METHOD OF MANUFACTURING BISMUTH-SUBSTITUTED RARE EARTH IRON GARNET SINGLE CRYSTAL | Tamotsu Sugawara, Kazuhito Yamasawa | 2004-08-10 |
| 6527973 | Magnetic garnet material and magnetooptical device using the same | Kazuhito Yamasawa | 2003-03-04 |