de Roo; Dion I.

Patent Applications and Registrations

Patent applications and USPTO patent grants for de Roo; Dion I..The latest application filed is for "electret assembly for a microphone having a backplate with improved charge stability".

Company Profile

0.7.6

de Roo; Dion I. - Voorburg NL

*profile and listings may contain filings by different individuals or companies with the same name. Review application materials to confirm ownership/assignment.

Patent Activity

Patent	Date
Electret assembly for a microphone having a backplate with improved charge stability Grant 8,280,082 - van Halteren , et al. October 2, 2	2012-10-02
Electret Assembly For A Microphone Having A Backplate With Improved Charge Stability App 20100172521 - van Halteren; Aart Z. ; et al.	2010-07-08
Electret assembly for a microphone having a backplate with improved charge stability Grant 7,684,575 - van Halteren , et al. March 23, 2	2010-03-23
Cylindrical microphone having an electret assembly in the end cover Grant 7,286,680 - Steeman , et al. October 23, 2	2007-10-23
Microphone having a flexible printed circuit board for mounting components Grant 7,239,714 - de Blok , et al. July 3, 2	2007-07-03
Electret assembly for a microphone having a backplate with improved charge stability App 20070121982 - van Halteren; Aart Z. ; et al.	2007-05-31
Electret assembly for a microphone having a backplate with improved charge stability Grant 7,136,496 - van Halteren , et al. November 14, 2	2006-11-14
Cylindrical microphone having an electret assembly in the end cover App 20060215867 - Steeman; Michael G.M. ; et al.	2006-09-28
Cylindrical microphone having an electret assembly in the end cover Grant 7,062,058 - Steeman , et al. June 13, 2	2006-06-13
Microphone for a listening device having a reduced humidity coefficient Grant 6,937,735 - de Roo , et al. August 30, 2	2005-08-30
Electret assembly for a microphone having a backplate with improved charge stability App 20030076970 - van Halteren, Aart Z. ; et al.	2003-04-24
Microphone for a listening device having a reduced humidity coefficient App 20030026444 - de Roo, Dion I. ; et al.	2003-02-06
Cylindrical microphone having an electret assembly in the end cover App 20020154790 - Steeman, Michael G. M. ; et al.	2002-10-24

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