| 7729504 |
Ferrofluid centered voice coil speaker |
Ronald E. Rosensweig |
2010-06-01 |
| 7266214 |
Audio speaker and method for assembling an audio speaker |
— |
2007-09-04 |
| 7248714 |
Micro-speaker and method for assembling a micro-speaker |
— |
2007-07-24 |
| 7063802 |
Composition and method of making an element-modified ferrofluid |
Koji Nemoto, Nobuharu Iijima, Nobuaki Kurihara |
2006-06-20 |
| 6868167 |
Audio speaker and method for assembling an audio speaker |
— |
2005-03-15 |
| 6804368 |
Micro-speaker and method for assembling a micro-speaker |
— |
2004-10-12 |
| 6277298 |
Ferrofluid composition and process |
Lucian Borduz, Yasutake Hirota |
2001-08-21 |
| 6261471 |
Composition and method of making a ferrofluid having an improved chemical stability |
Yasutake Hirota, Hisao Suzuki |
2001-07-17 |
| 6056889 |
Process for producing a magnetic fluid and composition therefor |
Kacey Wiley Heckman, Yasutake Hirota, Stefan Borduz, Lucian Borduz |
2000-05-02 |
| 5879580 |
Ferrofluid having improved oxidation resistance |
Mayumi Takayama |
1999-03-09 |
| 5730893 |
Magnetic colloids using acid terminated poly (12-hydroxystearic acid) dispersants |
John E. Wyman |
1998-03-24 |
| 5676877 |
Process for producing a magnetic fluid and composition therefor |
Stefan Borduz, Lucian Borduz |
1997-10-14 |
| 5656196 |
Ferrofluid having improved oxidation resistance |
Mayumi Takayama |
1997-08-12 |