Patents by Inventor Masahide Ohnuki

Masahide Ohnuki 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
    Patent number: 7137906
    Abstract: A golf club head in which a frequency F (fix) indicating a primary minimum value of a frequency transfer function of a head obtained by firmly fixing the head to a vibrator and measured in accordance with an vibrator method is between 600 and 1200 (Hz), and a frequency F (free) indicating a primary minimum value of a frequency transfer function of the head obtained by making the head in a free state and measured in accordance with an impact hammer method is between 2500 and 4000 (Hz).
    Type: Grant
    Filed: December 18, 2002
    Date of Patent: November 21, 2006
    Assignee: SRI Sports Limited
    Inventors: Masaya Tsunoda, Hisashi Kakiuchi, Masahide Ohnuki, Hiroto Setokawa
  • Golf club head
    Publication number: 20030162607
    Abstract: A golf club head in which a frequency F (fix) indicating a primary minimum value of a frequency transfer function of a head obtained by firmly fixing the head to a vibrator and measured in accordance with an vibrator method is between 600 and 1200 (Hz), and a frequency F (free) indicating a primary minimum value of a frequency transfer function of the head obtained by making the head in a free state and measured in accordance with an impact hammer method is between 2500 and 4000 (Hz).
    Type: Application
    Filed: December 18, 2002
    Publication date: August 28, 2003
    Inventors: Masaya Tsunoda, Hisashi Kakiuchi, Masahide Ohnuki, Hiroto Setokawa