Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9961447 | Micro speaker | Maria Papakyriacou | 2018-05-01 |
| 8594348 | Asymmetrical moving systems for a piezoelectric speaker and asymmetrical speaker | Josef Lutz | 2013-11-26 |
| 8284964 | Compound membrane, method of manufacturing the same, and acoustic device | Josef Lutz, Ewald Frasl | 2012-10-09 |
| 8233646 | Acoustic device and method of manufacturing same | Josef Lutz | 2012-07-31 |
| 7946378 | Membrane for an electroacoustic transducer | Helmut Wasinger, Josef Lutz | 2011-05-24 |
| 7866439 | Membrane for an electroacoustic transducer | Helmut Wasinger, Josef Lutz | 2011-01-11 |
| 7644801 | Membrane with a high resistance against buckling and/or crinkling | Erich Klein, Ewald Frasl | 2010-01-12 |