Yasumasa Tamai

Person

Hitachi, JP

People

Patents Grantslast 30 patents

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
Method for weld repairing of structures in nuclear reactors
- Patent number 5,674,419
- Issue date Oct 7, 1997
- Hitachi, Ltd.
- Hiroo Koide
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Metal member quality improving method by spot welding
- Patent number 5,494,539
- Issue date Feb 27, 1996
- Hitachi, Ltd.
- Hiroshi Tsujimura
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR
Information Patent Grant
Method of and apparatus for water-jet peening
- Patent number 5,305,361
- Issue date Apr 19, 1994
- Hitachi, Ltd.
- Kunio Enomoto
- C21 - METALLURGY OF IRON
Information Patent Grant
Method for improving property of weld of austenitic stainless steel
- Patent number 5,022,936
- Issue date Jun 11, 1991
- Hitachi, Ltd.
- Hiroshi Tsujimura
- C21 - METALLURGY OF IRON
Information Patent Grant
Water sealing device for use in replacing control rod drive housing
- Patent number 4,601,872
- Issue date Jul 22, 1986
- Hitachi, Ltd.
- Yoshio Yada
- G21 - NUCLEAR PHYSICS NUCLEAR ENGINEERING
Information Patent Grant
Method of repairing housing of control rod driving system
- Patent number 4,440,339
- Issue date Apr 3, 1984
- Hitachi, Ltd.
- Yasumasa Tamai
- G21 - NUCLEAR PHYSICS NUCLEAR ENGINEERING
Information Patent Grant
Method of correcting distorted pipe end
- Patent number 4,262,517
- Issue date Apr 21, 1981
- Hitachi, Ltd.
- Hideaki Kamohara
- B21 - MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL PUNCHING...
Information Patent Grant
Method for welding tubular members of stainless steel
- Patent number 4,247,037
- Issue date Jan 27, 1981
- Hitachi, Ltd.
- Yasumasa Tamai
- B23 - MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR

Yasumasa Tamai

Person

Patents Grantslast 30 patents

Underwater laser processing device including chamber with partition...

Submerged laser beam irradiation equipment

Method for weld repairing of structures in nuclear reactors

Metal member quality improving method by spot welding

Method of and apparatus for water-jet peening

Method for improving property of weld of austenitic stainless steel

Water sealing device for use in replacing control rod drive housing

Method of repairing housing of control rod driving system

Method of correcting distorted pipe end

Method for welding tubular members of stainless steel