Hiroshi Umezaki

Person

Tokyo, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Magnetic bubble memory element
- Patent number 4,772,505
- Issue date Sep 20, 1988
- Hitachi, Ltd.
- Haruhiko Matsuyama
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Grant
Magnetic bubble memory device
- Patent number 4,755,430
- Issue date Jul 5, 1988
- Hitachi, Ltd.
- Masatoshi Takeshita
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic bubble memory device
- Patent number 4,578,775
- Issue date Mar 25, 1986
- Hitachi, Ltd.
- Ryo Suzuki
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of fabricating magnetic bubble memory device
- Patent number 4,556,582
- Issue date Dec 3, 1985
- Hitachi, Ltd.
- Ryo Imura
- G11 - INFORMATION STORAGE
Information Patent Grant
Process for forming fine patterns
- Patent number 4,502,916
- Issue date Mar 5, 1985
- Hitachi, Ltd.
- Hiroshi Umezaki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Magnetic bubble memory device
- Patent number 4,503,517
- Issue date Mar 5, 1985
- Hitachi, Ltd.
- Hiroshi Umezaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of making magnetic bubble memory device by implanting hydrog...
- Patent number 4,460,412
- Issue date Jul 17, 1984
- Hitachi, Ltd.
- Ryo Imura
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Photomask
- Patent number 4,415,262
- Issue date Nov 15, 1983
- Hitachi, Ltd.
- Naoki Koyama
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Magnetic bubble memory device and method of fabricating the same
- Patent number 4,344,153
- Issue date Aug 10, 1982
- Hitachi, Ltd.
- Hideki Nishida
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of forming a microscopic pattern
- Patent number 4,288,283
- Issue date Sep 8, 1981
- Hitachi, Ltd.
- Hiroshi Umezaki
- G03 - PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY
Information Patent Grant
Magnetic bubble memory device
- Patent number 4,262,054
- Issue date Apr 14, 1981
- Hitachi, Ltd.
- Hiroshi Umezaki
- H01 - BASIC ELECTRIC ELEMENTS

Hiroshi Umezaki

Person

Patents Grantslast 30 patents

Magnetic bubble memory element

Magnetic bubble memory device

Magnetic bubble memory device

Method of fabricating magnetic bubble memory device

Process for forming fine patterns

Magnetic bubble memory device

Method of making magnetic bubble memory device by implanting hydrog...

Photomask

Magnetic bubble memory device and method of fabricating the same

Method of forming a microscopic pattern

Magnetic bubble memory device