Hiroaki Doi

Follow

Person

Tsuchiura, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Electronic circuit device with reduced breaking and cracking
- Patent number 7,230,320
- Issue date Jun 12, 2007
- Hitachi, Ltd.
- Hiroaki Doi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Cooling system for motor and cooling control method
- Patent number 6,889,516
- Issue date May 10, 2005
- Hitachi, Ltd.
- Kaname Sasaki
- H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
Information Patent Grant
Resin sealed semiconductor device having improved arrangement for r...
- Patent number 6,265,784
- Issue date Jul 24, 2001
- Hitachi, Ltd.
- Kenya Kawano
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Cooling system for motor and cooling control method
- Publication number 20040194497
- Publication date Oct 7, 2004
- Kaname Sasaki
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Electronic circuit device
- Publication number 20040159919
- Publication date Aug 19, 2004
- Hitachi, Ltd.
- Hiroaki Doi
- H01 - BASIC ELECTRIC ELEMENTS