Ryoichi Hiratsuka

Person

Miyagi, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Magnetic recording medium
- Patent number 11,621,020
- Issue date Apr 4, 2023
- Sony Corporation
- Junichi Tachibana
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium having reinforced substrate
- Patent number 11,468,910
- Issue date Oct 11, 2022
- Sony Corporation
- Hiroto Atagi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium and method of producing the same
- Patent number 11,423,936
- Issue date Aug 23, 2022
- Sony Corporation
- Junichi Tachibana
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic field generation apparatus and sputtering apparatus
- Patent number 9,607,813
- Issue date Mar 28, 2017
- Sony Corporation
- Jun Sasaki
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Magnetic recording medium
- Patent number 7,531,251
- Issue date May 12, 2009
- Sony Corporation
- Ichiro Kanagawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Metallic thin film type magnetic recording medium and method of man...
- Patent number 7,449,221
- Issue date Nov 11, 2008
- Sony Corporation
- Ryoichi Hiratsuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium and process for producing same
- Patent number 7,214,436
- Issue date May 8, 2007
- Sony Corporation
- Ryoichi Hiratsuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Metallic thin film type magnetic recording medium and method of man...
- Patent number 7,070,871
- Issue date Jul 4, 2006
- Sony Corporation
- Ryoichi Hiratsuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Cleaning tape with surface protrusions formed by particles of prede...
- Patent number 6,999,278
- Issue date Feb 14, 2006
- Sony Corporation
- Hidetoshi Honda
- G11 - INFORMATION STORAGE
Information Patent Grant
Cleaning tape
- Patent number 6,800,374
- Issue date Oct 5, 2004
- Sony Corporation
- Hidetoshi Honda
- G11 - INFORMATION STORAGE
Information Patent Grant
Thin-film forming method and thin-film forming apparatus
- Patent number 6,447,652
- Issue date Sep 10, 2002
- Sony Corporation
- Shunji Amano
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Apparatus for producing thin film, process for producing thin film...
- Patent number 6,319,325
- Issue date Nov 20, 2001
- Sony Corporation
- Ryoichi Hiratsuka
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Grant
Magnetic recording medium
- Patent number 6,110,584
- Issue date Aug 29, 2000
- Sony Corporation
- Ryoichi Hiratsuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium and method for producing same
- Patent number 5,968,609
- Issue date Oct 19, 1999
- Sony Corporation
- Yukari Yamada
- G11 - INFORMATION STORAGE
Information Patent Grant
Magnetic recording medium and method for producing same
- Patent number 5,945,219
- Issue date Aug 31, 1999
- Sony Corporation
- Yukari Yamada
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
MAGNETIC RECORDING MEDIUM
- Publication number 20220108723
- Publication date Apr 7, 2022
- SONY CORPORATION
- Hiroto ATAGI
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC RECORDING TAPE AND MAGNETIC RECORDING TAPE CARTRIDGE
- Publication number 20220084550
- Publication date Mar 17, 2022
- SONY GROUP CORPORATION
- TOMOE OZAKI
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC RECORDING TAPE, METHOD OF PRODUCING THE SAME, AND MAGNETIC...
- Publication number 20200411044
- Publication date Dec 31, 2020
- SONY CORPORATION
- Kazuya HASHIMOTO
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
MAGNETIC RECORDING MEDIUM
- Publication number 20200075051
- Publication date Mar 5, 2020
- SONY CORPORATION
- JUNICHI TACHIBANA
- G11 - INFORMATION STORAGE
Information Patent Application
MAGNETIC FIELD GENERATION APPARATUS AND SPUTTERING APPARATUS
- Publication number 20150014158
- Publication date Jan 15, 2015
- SONY CORPORATION
- Jun Sasaki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
MAGNETIC RECORDING MEDIUM AND METHOD OF PRODUCING THE SAME
- Publication number 20140342189
- Publication date Nov 20, 2014
- SONY CORPORATION
- Junichi Tachibana
- G11 - INFORMATION STORAGE
Information Patent Application
SELF-LIMITING REACTION DEPOSITION APPARATUS AND SELF-LIMITING REACT...
- Publication number 20130089665
- Publication date Apr 11, 2013
- SONY CORPORATION
- Hiroya Takenaka
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Metallic Thin Film Type Magnetic Recording Medium and Method of Man...
- Publication number 20060240182
- Publication date Oct 26, 2006
- Ryoichi Hiratsuka
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording medium
- Publication number 20060154114
- Publication date Jul 13, 2006
- Ichiro Kanagawa
- G11 - INFORMATION STORAGE
Information Patent Application
Magnetic recording medium and process for producing same
- Publication number 20030224216
- Publication date Dec 4, 2003
- Ryoichi Hiratsuka
- G11 - INFORMATION STORAGE
Information Patent Application
Plasma chemical vapor deposition apparatus
- Publication number 20030217698
- Publication date Nov 27, 2003
- Ryoichi Hiratsuka
- C23 - COATING METALLIC MATERIAL COATING MATERIAL WITH METALLIC MATERIAL CHEMI...
Information Patent Application
Metallic thin film type magnetic recording medium and method of man...
- Publication number 20030039864
- Publication date Feb 27, 2003
- Ryoichi Hiratsuka
- G11 - INFORMATION STORAGE
Information Patent Application
Cleaning tape
- Publication number 20030031884
- Publication date Feb 13, 2003
- Hidetoshi Honda
- G11 - INFORMATION STORAGE

Ryoichi Hiratsuka

Person

Patents Grantslast 30 patents

Magnetic recording medium

Magnetic recording medium having reinforced substrate

Magnetic recording medium and method of producing the same

Magnetic field generation apparatus and sputtering apparatus

Magnetic recording medium

Metallic thin film type magnetic recording medium and method of man...

Magnetic recording medium and process for producing same

Metallic thin film type magnetic recording medium and method of man...

Cleaning tape with surface protrusions formed by particles of prede...

Cleaning tape

Thin-film forming method and thin-film forming apparatus

Apparatus for producing thin film, process for producing thin film...

Magnetic recording medium

Magnetic recording medium and method for producing same

Magnetic recording medium and method for producing same

Patents Applicationslast 30 patents

MAGNETIC RECORDING MEDIUM

MAGNETIC RECORDING TAPE AND MAGNETIC RECORDING TAPE CARTRIDGE

MAGNETIC RECORDING TAPE, METHOD OF PRODUCING THE SAME, AND MAGNETIC...

MAGNETIC RECORDING MEDIUM

MAGNETIC FIELD GENERATION APPARATUS AND SPUTTERING APPARATUS

MAGNETIC RECORDING MEDIUM AND METHOD OF PRODUCING THE SAME

SELF-LIMITING REACTION DEPOSITION APPARATUS AND SELF-LIMITING REACT...

Metallic Thin Film Type Magnetic Recording Medium and Method of Man...

Magnetic recording medium

Magnetic recording medium and process for producing same

Plasma chemical vapor deposition apparatus

Metallic thin film type magnetic recording medium and method of man...

Cleaning tape