Yoichi Yokoyama

Person

Amagasaki, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Plural sealed contact units with common electromagnetic operating m...
- Patent number 5,420,555
- Issue date May 30, 1995
- Matsushita Electric Works, Ltd.
- Takehiko Toguchi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Damper, electromagnet assembly employing the damper, and relay empl...
- Patent number 5,389,905
- Issue date Feb 14, 1995
- Matsushita Electric Works, Ltd.
- Kiwamu Shibata
- F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
Information Patent Grant
Electromagnetic relay
- Patent number 5,359,305
- Issue date Oct 25, 1994
- Matsushita Electric Works, Ltd.
- Nobuhiro Kitamura
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Welding free relay contact device
- Patent number 5,049,845
- Issue date Sep 17, 1991
- Matsushita Electric Works, Ltd.
- Yoichi Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Remotely controllable circuit breaker
- Patent number RE33325
- Issue date Sep 4, 1990
- Matsushita Electric Works, Ltd.
- Yoichi Yokoyama
- 335 - Electricity: magnetically operated switches, magnets, and electromagnets
Information Patent Grant
Polarized electromagnet
- Patent number 4,855,701
- Issue date Aug 8, 1989
- Electric Power Research Institute, Inc.
- Yoichi Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Current limiting circuit breaker with an arc shearing plate
- Patent number 4,752,660
- Issue date Jun 21, 1988
- Matsushita Electric Works, Ltd.
- Yoichi Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Remotely controllable relay
- Patent number 4,703,294
- Issue date Oct 27, 1987
- Matsushita Electric Works, Ltd.
- Yoichi Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Remotely controllable circuit breaker
- Patent number 4,604,596
- Issue date Aug 5, 1986
- Matsushita Electric Works, Ltd.
- Yoichi Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS

Yoichi Yokoyama

Person

Patents Grantslast 30 patents

Plural sealed contact units with common electromagnetic operating m...

Damper, electromagnet assembly employing the damper, and relay empl...

Electromagnetic relay

Welding free relay contact device

Remotely controllable circuit breaker

Polarized electromagnet

Current limiting circuit breaker with an arc shearing plate

Remotely controllable relay

Remotely controllable circuit breaker