Patents Represented by Attorney Francois de Villiers
  • Patent number: 7499555
    Abstract: Personal communication method and apparatus, such as telephone handsets and headsets, with acoustic stray field cancellation are disclosed. The personal communications device employs an echo canceling receiver generally including two displacement sources that are not in phase formed by at least one driver, an acoustic cavity corresponding to each displacement source, and an acoustic output port corresponding to and in acoustic connection with each displacement source via the corresponding acoustic cavity such that the acoustic length between the acoustic centers of the two ports is less than the distance between the acoustic center of each port and the acoustic center of the corresponding displacement source to which the port is acoustically connected. In another embodiment, the ports may be such that both ports are located on a same side of a surface of at least one of the displacement sources.
    Type: Grant
    Filed: December 2, 2002
    Date of Patent: March 3, 2009
    Assignee: Plantronics, Inc.
    Inventor: Osman K. Isvan
  • Patent number: D535976
    Type: Grant
    Filed: September 9, 2005
    Date of Patent: January 30, 2007
    Assignee: Creative Technology Ltd
    Inventors: Yuet Syn Joey Ng, Kar Choon Ng
  • Patent number: D539270
    Type: Grant
    Filed: January 3, 2006
    Date of Patent: March 27, 2007
    Assignee: Creative Technology Ltd
    Inventors: Wei Lit Wilfred Leung, Kin Fui Chong, Kar Choon Ng
  • Patent number: D540327
    Type: Grant
    Filed: February 17, 2005
    Date of Patent: April 10, 2007
    Assignee: Creative Technology Ltd
    Inventors: Ka-Wei Adrian Wong, Chia Wei Oo
  • Patent number: D540818
    Type: Grant
    Filed: January 3, 2006
    Date of Patent: April 17, 2007
    Assignee: Creative Technology Ltd
    Inventors: Kittichai Reawsanguanwong, Anthony Kok Chong Oh
  • Patent number: D549219
    Type: Grant
    Filed: June 16, 2006
    Date of Patent: August 21, 2007
    Assignee: Creative Technology Ltd
    Inventors: Jason Tan, Kar Choon Ng
  • Patent number: D550224
    Type: Grant
    Filed: July 19, 2006
    Date of Patent: September 4, 2007
    Assignee: Creative Technology Ltd
    Inventor: Li Ern Ernest Sim
  • Patent number: D550266
    Type: Grant
    Filed: January 3, 2006
    Date of Patent: September 4, 2007
    Assignee: Creative Technology Ltd
    Inventor: Wee Min Alfred Lau
  • Patent number: D550267
    Type: Grant
    Filed: January 3, 2006
    Date of Patent: September 4, 2007
    Assignee: Creative Technology Ltd
    Inventors: Anthony Kok Chong Oh, Kittichai Reawsanguanwong
  • Patent number: D550657
    Type: Grant
    Filed: March 31, 2006
    Date of Patent: September 11, 2007
    Assignee: Creative Technology Ltd
    Inventors: Hui Ling Gan, Vince Ang
  • Patent number: D551276
    Type: Grant
    Filed: January 3, 2006
    Date of Patent: September 18, 2007
    Assignee: Creative Technology Ltd
    Inventor: Wee Min Alfred Lau
  • Patent number: D552083
    Type: Grant
    Filed: July 26, 2006
    Date of Patent: October 2, 2007
    Assignee: Creative Technology Ltd
    Inventor: Kittichai Reawsanguanwong
  • Patent number: D553611
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: October 23, 2007
    Assignee: Creative Technology Ltd
    Inventor: Hui Ling Gan
  • Patent number: D554106
    Type: Grant
    Filed: August 18, 2006
    Date of Patent: October 30, 2007
    Assignee: Creative Technology Ltd
    Inventors: Hui Ling Gan, Wei Lit Wilfred Leung, Lun Cheak Tan
  • Patent number: D555699
    Type: Grant
    Filed: April 13, 2006
    Date of Patent: November 20, 2007
    Assignee: Creative Technology Ltd
    Inventors: Kok Chong Anthony Oh, Andrew Loh
  • Patent number: D556188
    Type: Grant
    Filed: October 4, 2006
    Date of Patent: November 27, 2007
    Assignee: Creative Technology Ltd
    Inventors: Chien Mei Linda Ang, Sang Hoon Chung
  • Patent number: D558227
    Type: Grant
    Filed: May 21, 2007
    Date of Patent: December 25, 2007
    Assignee: Creative Technology Ltd
    Inventors: Mei San Gigi Cho, Kok Chong Anthony Oh, Boon Keat Eddy Toh, Kin Fui Chong
  • Patent number: D558228
    Type: Grant
    Filed: June 8, 2007
    Date of Patent: December 25, 2007
    Assignee: Creative Technologies Ltd
    Inventors: Boon Keat Eddy Toh, Kok Chong Anthony Oh
  • Patent number: D558791
    Type: Grant
    Filed: January 3, 2007
    Date of Patent: January 1, 2008
    Assignee: Creative Technology Ltd
    Inventors: Boon Keat Eddy Toh, Nicholas Stephen Marchand, Ka-Wei Adrian Wong, Kok Chong Anthony Oh
  • Patent number: D586836
    Type: Grant
    Filed: April 11, 2006
    Date of Patent: February 17, 2009
    Assignee: Creative Technology Ltd
    Inventors: Yuen Khim Joseph Liow, Siang Thia Goh, Jun Zhu