Patents by Inventor Naoya Joichi

Naoya Joichi 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).

  • Iron golf club head and iron golf club
    Patent number: 8834292
    Abstract: An iron golf club head includes: a head portion; and a badge portion adhered to the head portion. The head portion includes: a face surface; and a back surface located behind the face surface. The badge portion is adhered to at least one of a first largest amplitude region where an amplitude in a fourth-order vibration mode of the back surface is the largest and a second largest amplitude region where an amplitude in a fifth-order vibration mode of the back surface is the largest. As a result, there can be obtained an iron golf club head and an iron golf club, in which by suppressing decrease in resonant time of the hitting sound and reducing the sound pressure of the hitting sound, the hitting sound and the hitting feeling can be improved.
    Type: Grant
    Filed: March 28, 2012
    Date of Patent: September 16, 2014
    Assignee: Mizuno Corporation
    Inventors: Kei Tsuji, Yukihiro Teranishi, Naoya Joichi, Yasuyuki Ohta, Noriyuki Tabuchi, Kazuhiro Doi
  • IRON GOLF CLUB HEAD AND IRON GOLF CLUB
    Publication number: 20120252600
    Abstract: An iron golf club head includes: a head portion; and a badge portion adhered to the head portion. The head portion includes: a face surface; and a back surface located behind the face surface. The badge portion is adhered to at least one of a first largest amplitude region where an amplitude in a fourth-order vibration mode of the back surface is the largest and a second largest amplitude region where an amplitude in a fifth-order vibration mode of the back surface is the largest. As a result, there can be obtained an iron golf club head and an iron golf club, in which by suppressing decrease in resonant time of the hitting sound and reducing the sound pressure of the hitting sound, the hitting sound and the hitting feeling can be improved.
    Type: Application
    Filed: March 28, 2012
    Publication date: October 4, 2012
    Applicant: Mizuno Corporation
    Inventors: Kei Tsuji, Yukihiro Teranishi, Naoya Joichi, Yasuyuki Ohta, Noriyuki Tabuchi, Kazuhiro Doi