Patents by Inventor Yutaka Oku

Yutaka Oku 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).

  • Patent number: 5669824
    Abstract: An iron club and a set of the iron clubs which are improved to ensure a stable directional controllability and a flight of the hitted ball to the target, and to increase the flight distance of the hitted ball. The iron club is characterized in that a recessed portion is defined on a back portion of a head of the club, except for a peripheral portion thereof, so that the thickness of a face portion gradually decreases from the top, sole, toe, and the heal sides toward a sweet spot, and a thin portion which has the minimum thickness being provided on the sweet spot.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: September 23, 1997
    Assignee: Daiwa Seiko, Inc.
    Inventors: Yuichi Aizawa, Yutaka Oku
  • Patent number: 5465968
    Abstract: A golf clubhead is constructed such that a cavity portion having a face plate supporting wall at its bottom is provided in a face portion of a metal head body so that a face plate made of beryllium is mounted on the cavity portion. It is possible to increase the flying or driving distance of a golf ball.
    Type: Grant
    Filed: March 30, 1994
    Date of Patent: November 14, 1995
    Assignee: Daiwa Golf Co., Ltd.
    Inventors: Yuichi Aizawa, Yutaka Oku
  • Patent number: 5411264
    Abstract: A golf club head capable of reducing the vibration of the head at the moment of its impact on a golf ball even if the sweet spot is missed, thereby improving the directional property of the ball. The golf club head includes a face plate formed of resin mounted to a face portion of a head main body formed of metal. A flange portion extending backwardly of the head main body is disposed in a back portion of the head main body in a manner to extend along the peripheral edge portion of the back portion and correspond to the peripheral edge portion of the face plate. The flange portion is projected backwardly of the head main body longer than the thickness of the flange portion.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: May 2, 1995
    Assignee: Daiwa Golf Co., Ltd.
    Inventor: Yutaka Oku
  • Patent number: D360444
    Type: Grant
    Filed: December 30, 1993
    Date of Patent: July 18, 1995
    Assignee: Daiwa Golf Co., Ltd.
    Inventors: Kunihiko Takahashi, Yutaka Oku
  • Patent number: D363748
    Type: Grant
    Filed: July 19, 1994
    Date of Patent: October 31, 1995
    Assignee: Daiwa Golf Co., Ltd.
    Inventors: Kanji Iinuma, Yutaka Oku
  • Patent number: D369393
    Type: Grant
    Filed: January 30, 1995
    Date of Patent: April 30, 1996
    Assignee: Daiwa Golf Co., Ltd.
    Inventors: Kunihiko Takahashi, Yutaka Oku
  • Patent number: D380512
    Type: Grant
    Filed: December 29, 1995
    Date of Patent: July 1, 1997
    Assignee: Daiwa Seiko, Inc.
    Inventor: Yutaka Oku
  • Patent number: D397180
    Type: Grant
    Filed: September 11, 1996
    Date of Patent: August 18, 1998
    Assignee: Daiwa Seiko, Inc.
    Inventors: Kunihiko Takahashi, Takao Horie, Yutaka Oku
  • Patent number: D410514
    Type: Grant
    Filed: March 30, 1998
    Date of Patent: June 1, 1999
    Assignee: Daiwa Seiko, Inc.
    Inventors: Kunihiko Takahashi, Yutaka Oku, Kenichi Shinoda