Patents by Inventor Tsugunobu Sakamoto

Tsugunobu Sakamoto 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).

  • GOLF CLUB HEAD AND GOLF CLUB
    Publication number: 20150273287
    Abstract: A main body portion including a face and a recess formed on a back side of the face, an intermediate member being arranged in the recess, including a first member and a second member, and having a smaller specific gravity than the main body portion, and a high specific gravity member being arranged on a side opposite to the main body portion when viewed from the intermediate member and having a higher specific gravity than the intermediate member are provided.
    Type: Application
    Filed: March 26, 2015
    Publication date: October 1, 2015
    Inventors: Kazuhiro Doi, Tsugunobu Sakamoto
  • Iron-type golf club
    Patent number: D629061
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: December 14, 2010
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Chris Voshall, Kazuhiro Doi, Tsugunobu Sakamoto
  • Iron-type golf club head
    Patent number: D641444
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: July 12, 2011
    Assignee: Mizuno USA
    Inventors: David Llewellyn, Kazuhiro Doi, Tsugunobu Sakamoto
  • Iron-type golf club
    Patent number: D645103
    Type: Grant
    Filed: March 2, 2010
    Date of Patent: September 13, 2011
    Assignee: Mizuno USA
    Inventors: David Llewellyn, Kazuhiro Doi, Tsugunobu Sakamoto
  • Iron-type golf club head
    Patent number: D650878
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: December 20, 2011
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Kazuhiro Doi, Tsugunobu Sakamoto
  • Iron-type golf club
    Patent number: D659780
    Type: Grant
    Filed: June 3, 2011
    Date of Patent: May 15, 2012
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Tsugunobu Sakamoto
  • Wood-type golf club
    Patent number: D669546
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: October 23, 2012
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Tsugunobu Sakamoto
  • Wood-type golf club
    Patent number: D669948
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: October 30, 2012
    Assignee: Mizuno USA, Inc.
    Inventor: Tsugunobu Sakamoto
  • Hybrid-type golf club
    Patent number: D669949
    Type: Grant
    Filed: October 14, 2011
    Date of Patent: October 30, 2012
    Assignee: Mizuno USA, Inc.
    Inventor: Tsugunobu Sakamoto
  • Iron-type golf club head
    Patent number: D720027
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: December 23, 2014
    Assignee: Mizuno USA, Inc.
    Inventors: Chris Voshall, Kazuhiro Doi, Tsugunobu Sakamoto
  • Iron-type golf club head
    Patent number: D736872
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: August 18, 2015
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Kazuhiro Doi, Tsugunobu Sakamoto
  • Iron-type golf club head
    Patent number: D736873
    Type: Grant
    Filed: July 21, 2014
    Date of Patent: August 18, 2015
    Assignee: Mizuno USA, Inc.
    Inventors: Chris Voshall, Kazuhiro Doi, Tsugunobu Sakamoto