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Tokyo, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Rotary cam ring fluid machine
Patent number
8,784,084
Issue date
Jul 22, 2014
RichStone Limited
KwangSeon Hwang
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Scroll fluid machine
Patent number
8,585,383
Issue date
Nov 19, 2013
Richstone Limited
BooSeok Hwang
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Anti-self rotation mechanism of a scroll fluid machine
Patent number
8,371,834
Issue date
Feb 12, 2013
Richstone Limited
Booseok Hwang
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Grant
Optical fiber coupler reinforcing member and optical fiber coupler
Patent number
6,942,399
Issue date
Sep 13, 2005
Yamaha Corporation
Nanayuki Takeuchi
G02 - OPTICS
Information
Patent Grant
Optical fiber connecting element and alignment sleeve
Patent number
6,779,931
Issue date
Aug 24, 2004
NIT Advanced Technology Corporation of Tokyo
Norio Murata
G02 - OPTICS
Patents Applications
last 30 patents
Information
Patent Application
Scroll Liquid Pump
Publication number
20140170009
Publication date
Jun 19, 2014
RichStone Limited
BooSeok Hwang
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Application
Scroll fluid machine
Publication number
20130236344
Publication date
Sep 12, 2013
RichStone Limited (Korea)
BooSeok Hwang
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Application
Rotary Cam Ring Fluid Machine
Publication number
20130183171
Publication date
Jul 18, 2013
RICHSTONE LIMITED
KwangSeon Hwang
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Application
Scroll fluid machine
Publication number
20110300013
Publication date
Dec 8, 2011
RichStone Limited
BooSeok Hwang
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Application
Scroll fluid machine
Publication number
20110123324
Publication date
May 26, 2011
RICHSTONE LIMITED
BooSeok Hwang
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Application
Scroll fluid machine
Publication number
20110103991
Publication date
May 5, 2011
RichStone Limited
BooSeok Hwang
F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information
Patent Application
Scroll fluid machine
Publication number
20090297381
Publication date
Dec 3, 2009
RICHSTONE LIMITED
Booseok Hwang
F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information
Patent Application
Optical fiber coupler reinforcing member and optical fiber coupler
Publication number
20040071415
Publication date
Apr 15, 2004
Nanayuki Takeuchi
G02 - OPTICS
Information
Patent Application
Optical fiber connecting element and alignment sleeve
Publication number
20030091293
Publication date
May 15, 2003
Norio Murata
G02 - OPTICS