Hiroshi Umezaki

Person

Ehime, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Magnetic recording medium
- Patent number 5,616,410
- Issue date Apr 1, 1997
- Sumitomo Chemical Company, Limited
- Hiroshi Umezaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Method for producing silica-alumina fiber
- Patent number 5,575,964
- Issue date Nov 19, 1996
- Sumitomo Chemical Company, Limited
- Hiroshi Umezaki
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
Exhaust gas filter element
- Patent number 5,472,468
- Issue date Dec 5, 1995
- Sumitomo Chemical Company, Limited
- Hiroshi Umezaki
- F02 - COMBUSTION ENGINES HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
Information Patent Grant
Translucent polycrystalline alumina and process for producing the same
- Patent number 5,382,556
- Issue date Jan 17, 1995
- Sumitomo Chemical Company, Limited
- Hiroshi Takahashi
- C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
Information Patent Grant
.theta.-alumina powder, preparation thereof and magnetic recording...
- Patent number 5,348,920
- Issue date Sep 20, 1994
- Sumitomo Chemical Company, Limited
- Shoji Sugimoto
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Magnetic recording medium
- Patent number 5,141,807
- Issue date Aug 25, 1992
- Sumitomo Chemical Company, Limited
- Hiroshi Umezaki
- G11 - INFORMATION STORAGE
Information Patent Grant
Polishing composition for metallic material
- Patent number 5,114,437
- Issue date May 19, 1992
- Sumitomo Chemical Co., Ltd.
- Yoshiaki Takeuchi
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Abrasive, production thereof and use thereof in magnetic recording...
- Patent number 4,740,423
- Issue date Apr 26, 1988
- Sumitomo Chemical Company, Limited
- Hidekimi Kadokura
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Method for producing lithium aluminate powders
- Patent number 4,704,266
- Issue date Nov 3, 1987
- Sumitomo Chemical Company, Limited
- Hidekimi Kadokura
- C01 - INORGANIC CHEMISTRY
Information Patent Grant
Magnetic recording medium
- Patent number 4,671,993
- Issue date Jun 9, 1987
- Sumitomo Chemical Company, Limited
- Hidekimi Kadokura
- G11 - INFORMATION STORAGE
Information Patent Grant
Process for producing high purity metallic compound
- Patent number 4,650,895
- Issue date Mar 17, 1987
- Sumitomo Chemical Company, Limited
- Hidekimi Kadokura
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Abrasive, production thereof and use thereof in magnetic recording...
- Patent number 4,584,243
- Issue date Apr 22, 1986
- Sumitomo Chemical Company, Limited
- Hidekimi Kadokura
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Grant
Pigmented aluminum oxide powder and method of producing the same
- Patent number 4,498,931
- Issue date Feb 12, 1985
- Sumitomo Chemical Company, Limited
- Hidekimi Kadokura
- B82 - NANO-TECHNOLOGY

Hiroshi Umezaki

Person

Patents Grantslast 30 patents

Magnetic recording medium

Method for producing silica-alumina fiber

Exhaust gas filter element

Translucent polycrystalline alumina and process for producing the same

.theta.-alumina powder, preparation thereof and magnetic recording...

Magnetic recording medium

Polishing composition for metallic material

Abrasive, production thereof and use thereof in magnetic recording...

Method for producing lithium aluminate powders

Magnetic recording medium

Process for producing high purity metallic compound

Abrasive, production thereof and use thereof in magnetic recording...

Pigmented aluminum oxide powder and method of producing the same