Patents by Inventor Sunao Okamura

Sunao Okamura 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).

  • Electronic keyboard instrument
    Patent number: D507291
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: July 12, 2005
    Assignee: Yamaha Corporation
    Inventor: Sunao Okamura
  • Electronic keyboard instrument
    Patent number: D510381
    Type: Grant
    Filed: May 27, 2004
    Date of Patent: October 4, 2005
    Assignee: Yamaha Corporation
    Inventors: Sunao Okamura, Kunihiro Takei
  • Speaker
    Patent number: D520494
    Type: Grant
    Filed: November 10, 2004
    Date of Patent: May 9, 2006
    Assignee: Yamaha Corporation
    Inventors: Nobushiro Aiba, Sunao Okamura
  • Combined speaker and amplifier
    Patent number: D538259
    Type: Grant
    Filed: August 10, 2005
    Date of Patent: March 13, 2007
    Assignee: Yamaha Corporation
    Inventors: Sunao Okamura, Nobushiro Aiba
  • Piano
    Patent number: D474801
    Type: Grant
    Filed: April 10, 2002
    Date of Patent: May 20, 2003
    Assignee: Yamaha Corporation
    Inventor: Sunao Okamura
  • Combined speaker and amplifier
    Patent number: D579441
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: October 28, 2008
    Assignee: Yamaha Corporation
    Inventors: Sunao Okamura, Nobushiro Aiba
  • Combined speaker and amplifier
    Patent number: D579914
    Type: Grant
    Filed: December 19, 2007
    Date of Patent: November 4, 2008
    Assignee: Yamaha Corporation
    Inventors: Sunao Okamura, Nobushiro Aiba
  • Combined speaker and amplifier
    Patent number: D589929
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: April 7, 2009
    Assignee: Yamaha Corporation
    Inventors: Sunao Okamura, Nobushiro Aiba
  • Electronic keyboard instrument
    Patent number: D499442
    Type: Grant
    Filed: June 26, 2003
    Date of Patent: December 7, 2004
    Assignee: Yamaha Corporation
    Inventor: Sunao Okamura
  • Electronic piano
    Patent number: D369378
    Type: Grant
    Filed: February 23, 1995
    Date of Patent: April 30, 1996
    Assignee: Yamaha Corporation
    Inventor: Sunao Okamura
  • Electronic keyboard musical instrument
    Patent number: D411563
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: June 29, 1999
    Assignee: Yamaha Corporation
    Inventor: Sunao Okamura
  • Electric cello
    Patent number: D419587
    Type: Grant
    Filed: November 24, 1998
    Date of Patent: January 25, 2000
    Assignee: Yamaha Corporation
    Inventor: Sunao Okamura
  • Electronic keyboard
    Patent number: D668710
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: October 9, 2012
    Assignee: Yamaha Corporation
    Inventors: Sunao Okamura, Mami Sato
  • Digital piano
    Patent number: D718375
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: November 25, 2014
    Assignee: Yamaha Corporation
    Inventors: Sunao Okamura, Mami Sato, Takenori Omachi
  • Digital piano
    Patent number: D718808
    Type: Grant
    Filed: September 27, 2013
    Date of Patent: December 2, 2014
    Assignee: Yamaha Corporation
    Inventor: Sunao Okamura
  • Digital piano
    Patent number: D718809
    Type: Grant
    Filed: November 22, 2013
    Date of Patent: December 2, 2014
    Assignee: Yamaha Corporation
    Inventors: Takenori Omachi, Sunao Okamura, Mami Sato
  • Amplifier
    Patent number: D903625
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: December 1, 2020
    Assignee: YAMAHA CORPORATION
    Inventor: Sunao Okamura
  • Amplifier
    Patent number: D933629
    Type: Grant
    Filed: July 25, 2019
    Date of Patent: October 19, 2021
    Assignee: YAMAHA CORPORATION
    Inventor: Sunao Okamura