Akio Kumada

Follow

Person

Kodaira, JA

People

Patents Grantslast 30 patents

Information Patent Grant
Irregular ferroelectric element devised for single domain-wall motion
- Patent number 4,088,391
- Issue date May 9, 1978
- Hitachi, Ltd.
- Akio Kumada
- G02 - OPTICS
Information Patent Grant
Dielectric matrix device
- Patent number 4,071,841
- Issue date Jan 31, 1978
- Hitachi, Ltd.
- Akio Kumada
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Irregular ferroelectric element devised for motion of plural domain...
- Patent number 4,046,455
- Issue date Sep 6, 1977
- Hitachi, Ltd.
- Akio Kumada
- G02 - OPTICS
Information Patent Grant
Ferroelectric analog memory device and method of operating the same
- Patent number 3,990,057
- Issue date Nov 2, 1976
- Hitachi, Ltd.
- Akio Kumada
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of writing and erasing information for electrooptic ceramic...
- Patent number 3,973,247
- Issue date Aug 3, 1976
- Hitachi, Ltd.
- Akio Kumada
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Domain switching element
- Patent number 3,953,109
- Issue date Apr 27, 1976
- Hitachi, Ltd.
- Akio Kumada
- G02 - OPTICS
Information Patent Grant
Irregular ferroelectric element for controllable single domain
- Patent number 3,936,146
- Issue date Feb 3, 1976
- Hitachi, Ltd.
- Akio Kumada
- G02 - OPTICS