Mikio Okawa

Person

Tama, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Contact material for a vacuum interrupter
- Patent number 5,420,384
- Issue date May 30, 1995
- Kabushiki Kaisha Toshiba
- Tsutomu Okutomi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Process for manufacturing a contact material for vacuum circuit bre...
- Patent number 5,403,543
- Issue date Apr 4, 1995
- Kabushiki Kaisha Toshiba
- Tsutomu Okutomi
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Contact material for vacuum circuit breakers
- Patent number 5,354,352
- Issue date Oct 11, 1994
- Kabushiki Kaisha Toshiba
- Tsuneyo Seki
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Contact forming material for a vacuum interrupter
- Patent number 5,149,362
- Issue date Sep 22, 1992
- Kabushiki Kaisha Toshiba
- Tsutomu Okutomi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of manufacturing a semiconductor device
- Patent number 5,056,702
- Issue date Oct 15, 1991
- Kabushiki Kaisha Toshiba
- Masako Nakahashi
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Contact forming material for a vacuum interrupter
- Patent number 5,045,281
- Issue date Sep 3, 1991
- Kabushiki Kaisha Toshiba
- Tsutomu Okutomi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Air-tight ceramic container
- Patent number 4,917,642
- Issue date Apr 17, 1990
- Kabushiki Kaisha Toshiba
- Masako Nakahashi
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Process of making a contact forming material for a vacuum valve
- Patent number 4,830,821
- Issue date May 16, 1989
- Kabushiki Kaisha Toshiba
- Tsutomu Okutomi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
Information Patent Grant
Contact forming material for a vacuum valve
- Patent number 4,777,335
- Issue date Oct 11, 1988
- Kabushiki Kaisha Toshiba
- Tsutomu Okutomi
- C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...

Mikio Okawa

Person

Patents Grantslast 30 patents

Contact material for a vacuum interrupter

Process for manufacturing a contact material for vacuum circuit bre...

Contact material for vacuum circuit breakers

Contact forming material for a vacuum interrupter

Method of manufacturing a semiconductor device

Contact forming material for a vacuum interrupter

Air-tight ceramic container

Process of making a contact forming material for a vacuum valve

Contact forming material for a vacuum valve