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| Number | Title | Issue Date |
| 7900337 | Method of making composite acoustic transducers A composite membrane acoustic transducer structure comprising a magnet assembly is arranged adjacent the composite membrane material. The magnet assembly is arranged to produce a flux field. A first layer of thin, elongate composite membrane material is held under t... | 03/08/2011 |
| 7894619 | Acoustic ribbon transducer arrangements A ribbonned microphone assembly, for adjustable sound receiving capabilities, including a transducer having a surrounding flux frame for positioning at least two magnets adjacent a suspended ribbon between the magnets. An array of receiving apertures is arranged in ... | 02/22/2011 |
| 7106876 | Microphone for simultaneous noise sensing and speech pickup The invention provides a microphone for the simultaneous pickup of both ambient background noise and speech in vehicles such as automobiles, aircraft, and marine vessels. The apparatus provides a plurality of cartridges that simultaneously exhibit frequency and pola... | 09/12/2006 |
| D519101 | Wireless receiver | 04/18/2006 |
| D519103 | Earphone | 04/18/2006 |
| D497156 | Microphone arm | 10/12/2004 |
| D496346 | Wireless receiver | 09/21/2004 |
| 6788791 | Delay network microphones with harmonic nesting The invention provides method and apparatus that utilize a plurality of port sub-arrays, in which each port sub-array comprises a plurality of acoustical ports. The ports of each port sub-array are spaced so that each port sub-array responds to acoustical signals th... | 09/07/2004 |
| D494956 | Earphone | 08/24/2004 |
| 6772854 | Device and method for inserting acoustic dampers into earphones The present invention relates generally to a device and method for inserting and retaining an acoustical damper in a sound port for in-ear monitoring systems. In particular, a device having an insertion rod for guiding an acoustical damper into the opening of a soun... | 08/10/2004 |
| D493441 | Base of a conference unit | 07/27/2004 |
| D491364 | Earphone carrying case | 06/15/2004 |
| 6741709 | Condenser microphone assembly A microphone assembly comprising a housing, the housing including an upper lip, a silicon backplate having a top portion, a bottom portion, an annular side portion, a silicon spacer integrally formed with the backplate and comprising at least one protrusion extendin... | 05/25/2004 |
