Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7891862 | Electromechanical escapement device and timepiece part utilizing such a device | Xuan Mai Tu | 2011-02-22 |
| 6712500 | Escapement device for timepiece | Xuan Mai Tu | 2004-03-30 |
| 6335619 | Inductive proximity sensor comprising a resonant oscillatory circuit responding to changes in inductive reaction | Xuan Mai Tu | 2002-01-01 |
| 6041022 | Mechanical-electric energy converter and watch part comprising this energy converter | Mai X. Tu, Jean-Pierre Musy | 2000-03-21 |
| 5774426 | Method and device for feeding a single-phase stepping motor | Mai X. Tu | 1998-06-30 |
| 5504408 | Method of feeding a single-phase stepping motor | Mai X. Tu | 1996-04-02 |
| 5498958 | Inductive proximity sensor with periodic switching for sensing the presence of objects | Mai X. Tu | 1996-03-12 |
| 5429889 | Measurement apparatus and process for sorting used batteries and accumulators | Mai Tu Xuan, Thinh Nguyen, Jean P. Wia | 1995-07-04 |
| 5400303 | Driving device for timepieces | Mai X. Tu | 1995-03-21 |
| 5247235 | Method of supplying power to a single phase step motor | Mai X. Tu | 1993-09-21 |
| 5166590 | Method and circuit for feeding a single-phase stepping motor | Mai X. Tu | 1992-11-24 |
| 5051633 | Multipolar stepping motor | Mai X. Tu | 1991-09-24 |
| 4911640 | Magnetic assembly means | — | 1990-03-27 |