Kiyoshi Nagai

Follow

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method of removing heavy metal in semiconductor substrate
- Patent number 8,173,523
- Issue date May 8, 2012
- Sumco Corporation
- Noritomo Mitsugi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical delay time adjuster and optical time-division multiplexer
- Patent number 6,215,941
- Issue date Apr 10, 2001
- Oki Electric Industry Co., Ltd.
- Kiyoshi Nagai
- G02 - OPTICS
Information Patent Grant
Distributed constant line coupling with a gap domain
- Patent number 5,905,415
- Issue date May 18, 1999
- Oki Electric Industry Co., Ltd.
- Hiroki Fujishiro
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Optical matrix switch having optimized crosstalk characteristics an...
- Patent number 4,852,958
- Issue date Aug 1, 1989
- Oki Electric Industry Co., Ltd.
- Hideaki Okuyama
- G02 - OPTICS
Information Patent Grant
Optical switch matrix
- Patent number 4,846,542
- Issue date Jul 11, 1989
- Oki Electric Industry Co., Ltd.
- Hideaki Okayama
- G02 - OPTICS
Information Patent Grant
Surface-acoustic-wave filter
- Patent number 4,649,357
- Issue date Mar 10, 1987
- Oki Electric Industry Co., Ltd.
- Kiyoshi Nagai
- H03 - BASIC ELECTRONIC CIRCUITRY

Patents Applicationslast 30 patents

Information Patent Application
METHOD OF REMOVING HEAVY METAL IN SEMICONDUCTOR SUBSTRATE
- Publication number 20110086494
- Publication date Apr 14, 2011
- SUMCO CORPORATION
- Noritomo Mitsugi
- H01 - BASIC ELECTRIC ELEMENTS