Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11051111 | Coil extension element | Franz Heidinger, Ernst Tomas | 2021-06-29 |
| 10009682 | Electroacoustic transducer | Michael Schoeffmann, Heribert Bauer | 2018-06-26 |
| 9137593 | Loudspeaker with port comprising a particle filter | Ernst Tomas | 2015-09-15 |
| 7796773 | Communication device comprising sound-conveying means for two sound-producing modes | — | 2010-09-14 |
| 7644801 | Membrane with a high resistance against buckling and/or crinkling | Ewald Frasl, Susanne Windischberger | 2010-01-12 |
| 7522741 | Electro-acoustic apparatus comprising an electro-acoustic transducer | — | 2009-04-21 |
| 7277555 | Electroacoustic transducer with built in transducer circuit | Michael Schoeffmann | 2007-10-02 |
| 6831989 | Electroacoustic transducer having a moving coil and having movable holding elements for the connecting leads of the moving coil | Ewald Frasl | 2004-12-14 |
| 6681024 | Device including a built-in electroacoustic transducer for optimum speech reproduction | Heinz Renner | 2004-01-20 |
| 6671384 | Apparatus having an electroacoustic transducer mounted on a p.c. board with the aid of a holding means | — | 2003-12-30 |
| 6628790 | Apparatus for on-ear operation and off-ear operation with two sound reproduction transducers | — | 2003-09-30 |
| 6490361 | Apparatus having a housing which accommodates a sound transducer and which has a passage | — | 2002-12-03 |
| 6463161 | Electroacoustic transducer having contact holding means for spring contacts for the electrical connection of the transducer | Heinz Nierlich, Thomas Pauser | 2002-10-08 |
| 6370257 | Apparatus including an electroacoustic transducer having terminal contacts which extend in the direction of the transducer axis and including a printed circuit board having mating contacts | Peter Bleim, Ewald Frasl, Ernst Ruberl | 2002-04-09 |
| 6178252 | Electroacoustic transducer comprising a diaphragm having through portions for mounting a voice coil | Ewald Frasl | 2001-01-23 |
| 6160897 | Apparatus for operation in an on-ear mode and an off-ear mode | — | 2000-12-12 |
| 6075866 | Electroacoustic transducer having axially extending corrugated supporting means for the diaphragm | Ewald Frasl | 2000-06-13 |
| 6072886 | Electroacoustic transducer comprising spring contacts formed with at least one bend | Ewald Frasl, Ernst Ruberl | 2000-06-06 |
| 6038327 | Electroacoustic transducer comprising a closing member for closing the rear volume of the transducer | Peter Bleim, Ewald Frasl, Ernst Ruberl | 2000-03-14 |
| 5770189 | Use of dibutyl malate as insect attractant | Michael John Airey, Angela Janousek, Stephen David Watkins | 1998-06-23 |
| 5635190 | Solubilizing agents | Peter Samuel James Cheetham, Thalie De Graaf, Angela Janousek, Stephen David Watkins | 1997-06-03 |
| 4490284 | 1,1-Di(C.sub.1 -C.sub.6 -alkyl)-2-phenyl-ethane derivatives as perfuming ingredients | Ernst-Joachim Brunke | 1984-12-25 |
| 4318831 | Polysubstituted cyclopentene derivatives | Ernst-Joachim Brunke | 1982-03-09 |
| 4313855 | Fixative for perfume compositions | Willi Rojahn | 1982-02-02 |
| 4252986 | Fixative for perfume compositions | Willi Rojahn | 1981-02-24 |