Issued Patents All Time
Showing 25 most recent of 53 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8531195 | Failure indicator seal for a rotary feedthrough | — | 2013-09-10 |
| 6899338 | Ferrofluid seal incorporating multiple types of ferrofluid | Zhixin Li | 2005-05-31 |
| 6543782 | Non-bursting ferrofluid seal | Ronald E. Rosensweig, Thomas J. Black, Jr. | 2003-04-08 |
| 6290894 | Ferrofluid sculpting apparatus | John Lennon | 2001-09-18 |
| 6254781 | Method for recycling ferrofluid constituents used in a materials separation process | — | 2001-07-03 |
| 6103107 | System for recycling ferrofluid constituents used in a materials separation process | — | 2000-08-15 |
| 6068785 | Method for manufacturing oil-based ferrofluid | Lutful M. Aziz, Ronald E. Rosensweig | 2000-05-30 |
| 5969589 | Quiet ferrofluid solenoid | — | 1999-10-19 |
| 5958282 | Low cost method for manufacturing ferrofluid | Lutful M. Aziz | 1999-09-28 |
| 5955934 | Quiet ferrofluid solenoid with cushion | — | 1999-09-21 |
| 5908987 | Sensor employing a sliding ferrofluid mass in a coated, non-wetting, housing | — | 1999-06-01 |
| 5851416 | Stable polysiloxane ferrofluid compositions and method of making same | Ronald E. Rosensweig, Lutful M. Aziz | 1998-12-22 |
| 5780741 | Sensor employing a sliding magnet suspended on ferrofluid | — | 1998-07-14 |
| 5636547 | Liquid level monitoring system having ferrofluid pressure sensor | Jay Greyson, Christian Ionescu | 1997-06-10 |
| 5490425 | Ferrofluid pressure sensor and warning device | James E. Torres, Susan Lanphear | 1996-02-13 |
| 5462685 | Ferrofluid-cooled electromagnetic device and improved cooling method | Ronald Moskowitz | 1995-10-31 |
| 5461677 | Loudspeaker | James Bonvouloir, Ronald Moskowitz | 1995-10-24 |
| 5452520 | Ferrofluid inclinometer | Christian Ionescu | 1995-09-26 |
| 5429000 | Ferrofluid pressure sensor | Ronald Moskowitz | 1995-07-04 |
| 5018751 | Stacked pole-piece ferrofluid seal apparatus | Ronald Moskowitz, Joseph Moses, James Bonvouloir, Frank Bloom | 1991-05-28 |
| 4927164 | Ferrofluid seal with epoxy pole pieces | Joseph Moses, Ronald Moskowitz, Frank Bloom | 1990-05-22 |
| 4898480 | Compact ferrofluidic electrically conducting sealed bearing | Hanumaiah L. Gowda, Ronald Moskowitz | 1990-02-06 |
| 4890850 | Tapered ferrofluid seal | Ronald Moskowitz, Frank Bloom | 1990-01-02 |
| 4865334 | Long-life multi-stage ferrofluid seals incorporating a ferrofluid reservoir | James Bonvouloir, Ronald Moskowitz, Frank Bloom | 1989-09-12 |
| 4830384 | Compact long-life magnetic fluid seal | Ronald Moskowitz | 1989-05-16 |