Shiro Tsuda

Person

Asahi-shi, Chiba, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Ferrofluid centered voice coil speaker
- Patent number 7,729,504
- Issue date Jun 1, 2010
- Ferrotec Corporation
- Shiro Tsuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Audio speaker and method for assembling an audio speaker
- Patent number 7,266,214
- Issue date Sep 4, 2007
- Ferrotec Corporation
- Shiro Tsuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Micro-speaker and method for assembling a micro-speaker
- Patent number 7,248,714
- Issue date Jul 24, 2007
- Ferrotec Corporation
- Shiro Tsuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Composition and method of making an element-modified ferrofluid
- Patent number 7,063,802
- Issue date Jun 20, 2006
- Ferrotec Corporation
- Shiro Tsuda
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Audio speaker and method for assembling an audio speaker
- Patent number 6,868,167
- Issue date Mar 15, 2005
- Ferrotec Corporation
- Shiro Tsuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Micro-speaker and method for assembling a micro-speaker
- Patent number 6,804,368
- Issue date Oct 12, 2004
- Ferrotec Corporation
- Shiro Tsuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Ferrofluid composition and process
- Patent number 6,277,298
- Issue date Aug 21, 2001
- Lucian Borduz
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Composition and method of making a ferrofluid having an improved ch...
- Patent number 6,261,471
- Issue date Jul 17, 2001
- Shiro Tsuda
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Process for producing a magnetic fluid and composition therefor
- Patent number 6,056,889
- Issue date May 2, 2000
- Ferrotec Corporation
- Shiro Tsuda
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ferrofluid having improved oxidation resistance
- Patent number 5,879,580
- Issue date Mar 9, 1999
- Ferrotec Corporation
- Shiro Tsuda
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Magnetic colloids using acid terminated poly (12-hydroxystearic aci...
- Patent number 5,730,893
- Issue date Mar 24, 1998
- Ferrotec Corporation
- John E. Wyman
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Process for producing a magnetic fluid and composition therefor
- Patent number 5,676,877
- Issue date Oct 14, 1997
- Ferrotec Corporation
- Stefan Borduz
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Ferrofluid having improved oxidation resistance
- Patent number 5,656,196
- Issue date Aug 12, 1997
- Ferrotec Corporation
- Shiro Tsuda
- H01 - BASIC ELECTRIC ELEMENTS

Patents Applicationslast 30 patents

Information Patent Application
Ferrofluid Centered Voice Coil Speaker
- Publication number 20070189577
- Publication date Aug 16, 2007
- Shiro Tsuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Audio speaker and method for assembling an audio speaker
- Publication number 20050105758
- Publication date May 19, 2005
- Shiro Tsuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Micro-speaker and method for assembling a micro-speaker
- Publication number 20040234096
- Publication date Nov 25, 2004
- Shiro Tsuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Composition and method of making an element-modified ferrofluid
- Publication number 20040195540
- Publication date Oct 7, 2004
- Shiro Tsuda
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
Micro-speaker and method for assembling a micro-speaker
- Publication number 20030194106
- Publication date Oct 16, 2003
- Shiro Tsuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Audio speaker and method for assembling an audio speaker
- Publication number 20030194107
- Publication date Oct 16, 2003
- Shiro Tsuda
- H04 - ELECTRIC COMMUNICATION TECHNIQUE

Shiro Tsuda

Person

Patents Grantslast 30 patents

Ferrofluid centered voice coil speaker

Audio speaker and method for assembling an audio speaker

Micro-speaker and method for assembling a micro-speaker

Composition and method of making an element-modified ferrofluid

Audio speaker and method for assembling an audio speaker

Micro-speaker and method for assembling a micro-speaker

Ferrofluid composition and process

Composition and method of making a ferrofluid having an improved ch...

Process for producing a magnetic fluid and composition therefor

Ferrofluid having improved oxidation resistance

Magnetic colloids using acid terminated poly (12-hydroxystearic aci...

Process for producing a magnetic fluid and composition therefor

Ferrofluid having improved oxidation resistance

Patents Applicationslast 30 patents

Ferrofluid Centered Voice Coil Speaker

Audio speaker and method for assembling an audio speaker

Micro-speaker and method for assembling a micro-speaker

Composition and method of making an element-modified ferrofluid

Micro-speaker and method for assembling a micro-speaker

Audio speaker and method for assembling an audio speaker