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Kiyoshi Yamaguchi
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Yokohama, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Liquid ejection head, ink cartridge, and image forming apparatus
Patent number
8,894,185
Issue date
Nov 25, 2014
Ricoh Company, Ltd.
Kunihiro Yamanaka
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Liquid droplet ejecting head, ink cartridge, and image forming appa...
Patent number
8,882,230
Issue date
Nov 11, 2014
Ricoh Company, Ltd.
Yusuke Nonoyama
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Inkjet head and image forming device
Patent number
8,777,382
Issue date
Jul 15, 2014
Ricoh Company, Ltd.
Masaki Kato
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Droplet ejection head, method of manufacturing droplet ejection hea...
Patent number
8,708,459
Issue date
Apr 29, 2014
Ricoh Company, Limited
Hideaki Nishimura
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Inkjet head and recording device
Patent number
8,657,418
Issue date
Feb 25, 2014
Ricoh Company, Ltd.
Masaki Kato
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Inkjet recording apparatus
Patent number
8,646,870
Issue date
Feb 11, 2014
Ricoh Company, Ltd.
Hideaki Nishimura
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Inkjet head and inkjet recording device
Patent number
8,556,396
Issue date
Oct 15, 2013
Ricoh Company, Ltd.
Masaki Kato
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Inkjet head
Patent number
8,491,103
Issue date
Jul 23, 2013
Ricoh Company, Ltd.
Masaki Kato
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Inkjet head
Patent number
8,414,110
Issue date
Apr 9, 2013
Ricoh Company, Ltd.
Masaki Kato
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Image forming apparatus
Patent number
8,197,048
Issue date
Jun 12, 2012
Ricoh Company, Ltd.
Kunihiro Yamanaka
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Piezoelectric actuator and manufacturing method thereof, liquid eje...
Patent number
8,047,637
Issue date
Nov 1, 2011
Ricoh Company, Ltd.
Kiyoshi Tsukamura
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Piezoelectric actuator and manufacturing method thereof, liquid eje...
Patent number
7,764,006
Issue date
Jul 27, 2010
Ricoh Company, Ltd.
Kiyoshi Tsukamura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Liquid discharge head, liquid discharge device, and image forming d...
Patent number
7,665,830
Issue date
Feb 23, 2010
Ricoh Company, Ltd.
Kenichiroh Hashimoto
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Liquid drop jet head, ink cartridge and ink jet recording apparatus
Patent number
7,364,253
Issue date
Apr 29, 2008
Ricoh Company, Ltd.
Kenichiro Hashimoto
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Liquid drop jet head, ink cartridge and ink jet recording apparatus
Patent number
6,913,348
Issue date
Jul 5, 2005
Ricoh Company, Ltd.
Kenichiro Hashimoto
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Liquid drop jet head and ink jet recording apparatus
Patent number
6,729,716
Issue date
May 4, 2004
Ricoh Company, Ltd.
Hirotoshi Eguchi
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Liquid drop jet head, ink cartridge and ink jet recording apparatus
Patent number
6,682,185
Issue date
Jan 27, 2004
Ricoh Company, Ltd.
Kenichiro Hashimoto
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Fabricating semiconductor memory devices with improved cell isolation
Patent number
6,093,603
Issue date
Jul 25, 2000
Ricoh Company, Ltd.
Kiyoshi Yamaguchi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Non-volatile electrically alterable semiconductor memory device
Patent number
5,952,691
Issue date
Sep 14, 1999
Ricoh Company, Ltd.
Kiyoshi Yamaguchi
G11 - INFORMATION STORAGE
Information
Patent Grant
Light-emitting diode and light-emitting diode array
Patent number
5,550,391
Issue date
Aug 27, 1996
Ricoh Company, Ltd.
Kiyoshi Yamaguchi
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Grant
Optical exclusive-or element
Patent number
5,260,586
Issue date
Nov 9, 1993
Ricoh Company, Ltd.
Hiroshi Kondoh
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Suspension device
Patent number
4,697,796
Issue date
Oct 6, 1987
Tokico Ltd.
Makoto Kitamura
B60 - VEHICLES IN GENERAL
Information
Patent Grant
Method of assembling combination shock absorber and air spring
Patent number
4,392,293
Issue date
Jul 12, 1983
Tokico Ltd.
Kiyoshi Yamaguchi
B60 - VEHICLES IN GENERAL
Patents Applications
last 30 patents
Information
Patent Application
INKJET RECORDING APPARATUS
Publication number
20130070021
Publication date
Mar 21, 2013
Hideaki Nishimura
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
INKJET HEAD AND RECORDING DEVICE
Publication number
20130050354
Publication date
Feb 28, 2013
RICOH COMPANY, LTD.
Masaki Kato
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
DROPLET EJECTION HEAD, METHOD OF MANUFACTURING DROPLET EJECTION HEA...
Publication number
20130021412
Publication date
Jan 24, 2013
Hideaki NISHIMURA
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
LIQUID DROPLET EJECTING HEAD, INK CARTRIDGE, AND IMAGE FORMING APPA...
Publication number
20130016152
Publication date
Jan 17, 2013
Yusuke NONOYAMA
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
INKJET HEAD AND INKJET RECORDING DEVICE
Publication number
20120320131
Publication date
Dec 20, 2012
RICOH COMPANY, LTD.
Masaki Kato
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
INKJET HEAD AND IMAGE FORMING DEVICE
Publication number
20120206545
Publication date
Aug 16, 2012
RICOH COMPANY, LTD.
Masaki Kato
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
INKJET HEAD
Publication number
20120206540
Publication date
Aug 16, 2012
RICOH COMPANY, LTD.
Masaki Kato
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
INKJET HEAD
Publication number
20120069101
Publication date
Mar 22, 2012
RICOH COMPANY, LTD.
Masaki Kato
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
PIEZOELECTRIC ACTUATOR AND MANUFACTURING METHOD THEREOF, LIQUID EJE...
Publication number
20100245490
Publication date
Sep 30, 2010
RICOH COMPANY, LTD.
Kiyoshi TSUKAMURA
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
LIQUID EJECTION HEAD, INK CARTRIDGE, AND IMAGE FORMING APPARATUS
Publication number
20100194823
Publication date
Aug 5, 2010
Kunihiro Yamanaka
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
Image forming apparatus
Publication number
20090102907
Publication date
Apr 23, 2009
Kunihiro Yamanaka
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
Liquid Discharge Head, Liquid Discharge Device, and Image Forming D...
Publication number
20070257968
Publication date
Nov 8, 2007
Kenichiroh Hashimoto
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
Piezoelectric actuator and manufacturing method thereof, liquid eje...
Publication number
20070247026
Publication date
Oct 25, 2007
Kiyoshi Tsukamura
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
Liquid drop discharge head, liquid drop discharge device, and image...
Publication number
20070008388
Publication date
Jan 11, 2007
Kiyoshi Yamaguchi
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
Liquid drop jet head, ink cartridge and ink jet recording apparatus
Publication number
20050219321
Publication date
Oct 6, 2005
Kenichiro Hashimoto
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
Liquid drop jet head, ink cartridge and ink jet recording apparatus
Publication number
20040104985
Publication date
Jun 3, 2004
Kenichiro Hashimoto
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
Liquid drop jet head and ink jet recording apparatus
Publication number
20030067513
Publication date
Apr 10, 2003
Ricoh Company, Ltd.
Hirotoshi Eguchi
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS
Information
Patent Application
Liquid drop jet head, ink cartridge and ink jet recording apparatus
Publication number
20020175980
Publication date
Nov 28, 2002
Kenichiro Hashimoto
B41 - PRINTING LINING MACHINES TYPEWRITERS STAMPS