Keizo Sugiyama

Follow

Person

Saitama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Methods and apparatus for wireless communications
- Patent number 7,486,928
- Issue date Feb 3, 2009
- KDDI Corporation
- Haruki Izumikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Packet control apparatus to connect interconnected network and wire...
- Patent number 7,349,372
- Issue date Mar 25, 2008
- KDDI Corporation
- Naoki Fuke
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
System and method for switching between frequency channels in wirel...
- Patent number 7,283,493
- Issue date Oct 16, 2007
- KDDI Corporation
- Keizo Sugiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Radio LAN master station system
- Patent number 7,123,941
- Issue date Oct 17, 2006
- KDDI R&D Laboratories Inc.
- Tadayuki Fukuhara
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Methods and apparatus for wireless communications
- Publication number 20060264172
- Publication date Nov 23, 2006
- KDDI CORPORATION
- Haruki Izumikawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Packet control apparatus to connect interconnected network and wire...
- Publication number 20040136347
- Publication date Jul 15, 2004
- KDDI CORPORATION
- Naoki Fuke
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
System and method for switching between frequency channels in wirel...
- Publication number 20020126635
- Publication date Sep 12, 2002
- KDDI CORPORATION
- Keizo Sugiyama
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Radio LAN master station system
- Publication number 20020128046
- Publication date Sep 12, 2002
- KDDI R&D Laboratories Inc.
- Tadayuki Fukuhara
- H01 - BASIC ELECTRIC ELEMENTS