Wataru Kumagai

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Ichikawa, JP

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Patents Grantslast 30 patents

Information Patent Grant
Communication system and network relay device
- Patent number 9,559,984
- Issue date Jan 31, 2017
- Hitachi Metals, Ltd.
- Tomoyoshi Tatsumi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system and network relay device
- Patent number 9,385,971
- Issue date Jul 5, 2016
- Hitachi Metals, Ltd.
- Nozomi Hashimoto
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Communication system and network relay device
- Patent number 9,306,845
- Issue date Apr 5, 2016
- Hitachi Metals, Ltd.
- Wataru Kumagai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

Information Patent Application
Network Relay System and Switching Device
- Publication number 20150049761
- Publication date Feb 19, 2015
- Hitachi Metals, Ltd.
- Wataru Kumagai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Communication System and Network Relay Device
- Publication number 20140226461
- Publication date Aug 14, 2014
- Hitachi Metals, Ltd.
- Nozomi HASHIMOTO
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Communication System and Network Relay Device
- Publication number 20140140346
- Publication date May 22, 2014
- Hitachi Metals, Ltd.
- Wataru KUMAGAI
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION SYSTEM AND NETWORK RELAY DEVICE
- Publication number 20140126352
- Publication date May 8, 2014
- Hitachi Metals, Ltd.
- Tomoyoshi Tatsumi
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
COMMUNICATION SYSTEM AND PROCESSING METHOD THEREFOR
- Publication number 20140071810
- Publication date Mar 13, 2014
- Hitachi Metals, Ltd.
- Wataru Kumagai
- H04 - ELECTRIC COMMUNICATION TECHNIQUE