Akira Onuma

Person

Hitachi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Method of high frequency pulse arc welding and apparatus therefor
- Patent number 6,225,598
- Issue date May 1, 2001
- Hitachi, Ltd.
- Masayasu Nihei
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Underwater laser processing device including chamber with partition...
- Patent number 5,977,515
- Issue date Nov 2, 1999
- Hitachi, Ltd.
- Keiichi Uraki
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Submerged laser beam irradiation equipment
- Patent number 5,938,954
- Issue date Aug 17, 1999
- Hitachi, Ltd.
- Tsutomu Onuma
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Thin film magnetic head and production method thereof and magnetic...
- Patent number 5,687,045
- Issue date Nov 11, 1997
- Hitachi, Ltd.
- Tetsuya Okai
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of repairing structural materials of nuclear reactor interna...
- Patent number 5,654,992
- Issue date Aug 5, 1997
- Hitachi, Ltd.
- Keiichi Uraki
- G21 - NUCLEAR PHYSICS NUCLEAR ENGINEERING
Information Patent Grant
Thin film magnetic head and method of manufacturing the same
- Patent number 5,316,617
- Issue date May 31, 1994
- Hitachi, Ltd.
- Takashi Kawabe
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Method for controlling arc welding and apparatus therefor
- Patent number 4,454,408
- Issue date Jun 12, 1984
- Hitachi, Ltd.
- Ryoichi Kajiwara
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of electrode current control in welding apparatus having a p...
- Patent number 4,396,823
- Issue date Aug 2, 1983
- Hitachi, Ltd.
- Masayasu Nihei
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Akira Onuma

Person

Patents Grantslast 30 patents

Method of high frequency pulse arc welding and apparatus therefor

Underwater laser processing device including chamber with partition...

Submerged laser beam irradiation equipment

Thin film magnetic head and production method thereof and magnetic...

Method of repairing structural materials of nuclear reactor interna...

Thin film magnetic head and method of manufacturing the same

Method for controlling arc welding and apparatus therefor

Method of electrode current control in welding apparatus having a p...