Yoshimi Hakamata

Person

Hitachi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes...
- Patent number 6,437,275
- Issue date Aug 20, 2002
- Hitachi, Ltd.
- Shigeru Kikuchi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum switch and a vacuum switchgear using the same
- Patent number 6,259,051
- Issue date Jul 10, 2001
- Hitachi, Ltd.
- Toru Tanimizu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum circuit breaker, and vacuum bulb and vacuum bulb electrode u...
- Patent number 6,248,969
- Issue date Jun 19, 2001
- Hitachi, Ltd.
- Katsuhiro Komuro
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum switch and a vacuum switchgear using the same
- Patent number 6,144,005
- Issue date Nov 7, 2000
- Hitachi, Ltd.
- Toru Tanimizu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum circuit breaker as well as vacuum valve and electric contact...
- Patent number 6,048,216
- Issue date Apr 11, 2000
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Vacuum circuit breaker as well as vacuum valve and electric contact...
- Patent number 5,852,266
- Issue date Dec 22, 1998
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Electrode for vacuum circuit breaker
- Patent number 5,763,848
- Issue date Jun 9, 1998
- Hitachi, Ltd.
- Yoshimi Hakamata
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method forming an electric contact in a vacuum circuit breaker
- Patent number 5,697,150
- Issue date Dec 16, 1997
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Vacuum circuit breaker with improved contact assembly
- Patent number 5,691,521
- Issue date Nov 25, 1997
- Hitachi, Ltd.
- Katsuhiro Komuro
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum circuit-breaker and electrode assembly therefor and a manufa...
- Patent number 5,612,523
- Issue date Mar 18, 1997
- Hitachi, Ltd.
- Yoshimi Hakamata
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum circuit interrupter
- Patent number 5,594,224
- Issue date Jan 14, 1997
- Hitachi, Ltd.
- Toru Tanimizu
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Vacuum circuit breaker and electric contact
- Patent number 5,557,083
- Issue date Sep 17, 1996
- Hitachi, Ltd.
- Katsuhiro Komuro
- B22 - CASTING POWDER METALLURGY
Information Patent Grant
Ion implanting apparatus
- Patent number 5,349,196
- Issue date Sep 20, 1994
- Hitachi, Ltd.
- Kensuke Amemiya
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Plasma generating apparatus
- Patent number 5,133,825
- Issue date Jul 28, 1992
- Hi Tachi, Ltd.
- Yoshimi Hakamata
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ion source application device
- Patent number 4,851,668
- Issue date Jul 25, 1989
- Hitachi, Ltd.
- Tasunori Ohno
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ion source device
- Patent number 4,847,476
- Issue date Jul 11, 1989
- Hitachi, Ltd.
- Tadashi Sato
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ion source
- Patent number 4,739,169
- Issue date Apr 19, 1988
- Hitachi, Ltd.
- Yukio Kurosawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ion source
- Patent number 4,713,585
- Issue date Dec 15, 1987
- Hitachi, Ltd.
- Yasunori Ohno
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Vacuum circuit-breaker, vacuum valve for use therein, and electrode...
- Publication number 20020117476
- Publication date Aug 29, 2002
- Hitachi, Ltd.
- Shigeru Kikuchi
- H01 - BASIC ELECTRIC ELEMENTS

Yoshimi Hakamata

Person

Patents Grantslast 30 patents

Vacuum circuit-breaker, vacuum bulb for use therein, and electrodes...

Vacuum switch and a vacuum switchgear using the same

Vacuum circuit breaker, and vacuum bulb and vacuum bulb electrode u...

Vacuum switch and a vacuum switchgear using the same

Vacuum circuit breaker as well as vacuum valve and electric contact...

Vacuum circuit breaker as well as vacuum valve and electric contact...

Electrode for vacuum circuit breaker

Method forming an electric contact in a vacuum circuit breaker

Vacuum circuit breaker with improved contact assembly

Vacuum circuit-breaker and electrode assembly therefor and a manufa...

Vacuum circuit interrupter

Vacuum circuit breaker and electric contact

Ion implanting apparatus

Plasma generating apparatus

Ion source application device

Ion source device

Ion source

Ion source

Patents Applicationslast 30 patents

Vacuum circuit-breaker, vacuum valve for use therein, and electrode...