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Lawrence Welk, the bandleader who entertained millions of Americans over a generation of broadcasting his TV show, once received a patent: for a music-themed design of an ashtray.
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| Number | Title | Issue Date |
| 7412066 | Microphone A sound recording and/or sound reproducing part loosely anchored/connected to a second part wherein the sound recording and/or sound reproducing part is levitated on a magnetic field. The sound recording and/or sound reproducing part and the second part in combinati... | 08/12/2008 |
| 7332849 | Method and transducers for dynamic testing of structures and materials A transducer for dynamic testing of specimen is disclosed. The transducer comprises at least two equally-spaced actuators, and a supporting block for supporting the at least two equally-spaced actuators and for mounting the transducer to the specimen. Each of the at... | 02/19/2008 |
| 7289638 | Electroacoustic microphone An electroacoustic capsule or electroacoustic transducer for an electroacoustic device has electrostrictive or magnetostrictive elements connected to a controllable power supply. Dimensional changes of the electrostrictive or magnetostrictive elements cause changes ... | 10/30/2007 |
| 7245738 | Electroacoustic transducer with small dimensions An electroacoustic transducer of small dimensions has a cup-shaped component made of a metallizable plastic material embedded in a housing component having a housing shape and being of a non-metallizable plastic material. The cup-shaped component has an inner surfac... | 07/17/2007 |
| 6731766 | Condenser microphone and production method thereof A condenser microphone has a conductive diaphragm 3 having an earth electrode layer 31 formed of a conductive light metal; a conductor fixed electrode 5 arranged opposite to the conductive diaphragm 3 through an air layer; an organic diel... | 05/04/2004 |
| 5618010 | Active noise control using a tunable plate radiator An active noise control subassembly for reducing noise caused by a source (such as an aircraft engine) independent of the subassembly. A noise radiating panel is bendably vibratable to generate a panel noise canceling at least a portion of the source nois... | 04/08/1997 |
