Patents by Inventor Takekazu Iijima

Takekazu Iijima has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Loudspeaker
    Patent number: D269870
    Type: Grant
    Filed: March 24, 1981
    Date of Patent: July 26, 1983
    Assignee: Pioneer Kabushiki Kaisha
    Inventor: Takekazu Iijima
  • Loudspeaker
    Patent number: D270909
    Type: Grant
    Filed: March 24, 1981
    Date of Patent: October 11, 1983
    Assignee: Pioneer Kabushiki Kaisha
    Inventor: Takekazu Iijima
  • Loudspeaker
    Patent number: D273106
    Type: Grant
    Filed: September 14, 1981
    Date of Patent: March 20, 1984
    Assignee: Pioneer Kabushiki Kaisha
    Inventor: Takekazu Iijima
  • Loudspeaker
    Patent number: D276153
    Type: Grant
    Filed: April 12, 1982
    Date of Patent: October 30, 1984
    Assignee: Pioneer Electronic Corporation
    Inventor: Takekazu Iijima
  • Speaker
    Patent number: D472545
    Type: Grant
    Filed: February 21, 2002
    Date of Patent: April 1, 2003
    Assignee: Pioneer Kabushiki Kaisha
    Inventors: Takekazu Iijima, Yumi Takigami, Koji Nakane
  • Loudspeaker
    Patent number: D281596
    Type: Grant
    Filed: July 25, 1983
    Date of Patent: December 3, 1985
    Assignee: Pioneer Electronic Corporation
    Inventor: Takekazu Iijima
  • Device for mixing sounds of musical instruments
    Patent number: D555637
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: November 20, 2007
    Assignee: Pioneer Corporation
    Inventors: Hideaki Ishizaki, Takekazu Iijima
  • Device for mixing sounds of musical instruments
    Patent number: D555638
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: November 20, 2007
    Assignee: Pioneer Corporation
    Inventors: Hideaki Ishizaki, Takekazu Iijima
  • Automobile combined stereo receiver and cassette tape player
    Patent number: D284369
    Type: Grant
    Filed: December 22, 1983
    Date of Patent: June 24, 1986
    Assignee: Pioneer Electronic Corporation
    Inventors: Hitoshi Nakamura, Takekazu Iijima, You Takagi, Shu Takahara
  • Speaker
    Patent number: D487738
    Type: Grant
    Filed: June 10, 2003
    Date of Patent: March 23, 2004
    Assignee: Pioneer Corporation
    Inventors: Takekazu Iijima, Yumi Takigami
  • Speaker
    Patent number: D493161
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: July 20, 2004
    Assignee: Pioneer Corporation
    Inventors: Takekazu Iijima, Koji Nakane, Junichi Tanaka
  • Speaker
    Patent number: D493445
    Type: Grant
    Filed: June 18, 2003
    Date of Patent: July 27, 2004
    Assignee: Pioneer Corporation
    Inventors: Takekazu Iijima, Koji Nakane, Junichi Tanaka
  • Digital audio disk player with acoustic mixer
    Patent number: D583798
    Type: Grant
    Filed: March 12, 2008
    Date of Patent: December 30, 2008
    Assignee: Pioneer Kabushiki Kaisha
    Inventors: Takekazu Iijima, Washin Boku
  • Audio mixer
    Patent number: D593544
    Type: Grant
    Filed: June 7, 2007
    Date of Patent: June 2, 2009
    Assignee: Pioneer Kabushiki Kaisha
    Inventors: Takekazu Iijima, Yuki Iida, Toshiyuki Sonoda, Yoshinori Nakatsuka
  • Digital audio disk player with mixing functions
    Patent number: D616410
    Type: Grant
    Filed: October 26, 2009
    Date of Patent: May 25, 2010
    Assignee: Pioneer Kabushiki Kaisha
    Inventors: Toshiyuki Sonoda, Takekazu Iijima
  • Controller for digital audio player
    Patent number: D666172
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: August 28, 2012
    Assignee: Pioneer Corporation
    Inventors: Takekazu Iijima, Takahiro Kuramoto
  • Controller for digital audio player
    Patent number: D666173
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: August 28, 2012
    Assignee: Pioneer Corporation
    Inventors: Takekazu Iijima, Takahiro Kuramoto
  • Device for mixing sounds of musical instruments
    Patent number: D668636
    Type: Grant
    Filed: June 24, 2011
    Date of Patent: October 9, 2012
    Assignee: Pioneer Corporation
    Inventor: Takekazu Iijima
  • Volume adjuster
    Patent number: D677247
    Type: Grant
    Filed: March 8, 2012
    Date of Patent: March 5, 2013
    Assignee: Pioneer Corporation
    Inventors: Takekazu Iijima, Naho Hatagishi, Junichi Tanaka
  • Digital audio player with a wireless connection and mixing function
    Patent number: D715264
    Type: Grant
    Filed: February 6, 2013
    Date of Patent: October 14, 2014
    Assignee: Pioneer Corporation
    Inventor: Takekazu Iijima