Patents by Inventor Isamu Toshinari

Isamu Toshinari 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 heads and golf club sets with variable weight distribution
    Patent number: 8021246
    Abstract: Described herein are iron golf club heads and sets of iron golf clubs that have variable weight distribution. Each iron golf club head has a cavity and a y-shaped cavity pad disposed on at least a portion of a back wall of the cavity. The y-shaped cavity pad provide reduced vibrations within the cavity when the iron golf club head strikes a golf ball. The y-shaped cavity pad also provides an enlarged sweet spot to provide increased forgiveness for off-center hits. Other aspects, features, and embodiments are also claimed and described.
    Type: Grant
    Filed: June 26, 2009
    Date of Patent: September 20, 2011
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Tetsuya Kanayama, Isamu Toshinari, Kazuhiro Doi, Tomoaki Aoki
  • IRON GOLF CLUB HEADS AND GOLF CLUB SETS WITH VARIABLE WEIGHT DISTRIBUTION
    Publication number: 20100160067
    Abstract: Described herein are iron golf club heads and sets of iron golf clubs that have variable weight distribution. Each iron golf club head has a cavity and a y-shaped cavity pad disposed on at least a portion of a back wall of the cavity. The y-shaped cavity pad provide reduced vibrations within the cavity when the iron golf club head strikes a golf ball. The y-shaped cavity pad also provides an enlarged sweet spot to provide increased forgiveness for off-center hits. Other aspects, features, and embodiments are also claimed and described.
    Type: Application
    Filed: June 26, 2009
    Publication date: June 24, 2010
    Applicant: MIZUNO USA, INC
    Inventors: DAVID LLEWELLYN, Tetsuya Kanayama, Isamu Toshinari, Kazuhiro Doi, Tomoaki Aoki
  • Iron golf club and golf club set
    Patent number: 7131913
    Abstract: A groove is provided a surface on a cavity portion side of a sole portion in a head portion of an iron golf club, and a thickness of a ball hitting portion in a face portion is made larger than a thickness of a top edge side portion of the face portion and at least as large as a thickness of a sole side portion of the face portion. In a golf club set according to the present invention, the groove has the greatest depth in a long iron golf club, while the groove has the smallest depth in a short iron golf club or no groove is provided in the short iron golf club.
    Type: Grant
    Filed: January 14, 2004
    Date of Patent: November 7, 2006
    Assignee: Mizuno Corporation
    Inventors: Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Mamoru Saraie, Kiyotaka Chaen
  • Iron golf club and golf club set with variable weight distribution
    Patent number: 7022028
    Abstract: An iron golf club and a set of iron golf clubs that have a variable weight distribution. Each iron golf club head has a cavity and a raised wall portion that extends upward from the sole and offset from the cavity. The raised wall portion is separated from the cavity by a groove set at an oblique angle to the face portion of the iron golf club The groove deepens the center of mass depth and lengthens the effective face length of the iron golf club. The width of the groove may vary between each golf club in a set of iron golf clubs, such that the width of the groove of the long irons is greater that the width of the groove of the middle irons, and the width of the groove of the middle irons is greater than the width of the groove of the short irons.
    Type: Grant
    Filed: July 31, 2004
    Date of Patent: April 4, 2006
    Assignee: Mizuno Corporation
    Inventors: Masao Nagai, David G. Llewellyn, Harry B. Taylor, Mamoru Saraie, Isamu Toshinari
  • Iron golf club and golf club set with variable weight distribution
    Publication number: 20050085312
    Abstract: An iron golf club and a set of iron golf clubs that have a variable weight distribution. Each iron golf club head has a cavity and a raised wall portion that extends upward from the sole and offset from the cavity. The raised wall portion is separated from the cavity by a groove set at an oblique angle to the face portion of the iron golf club The groove deepens the center of mass depth and lengthens the effective face length of the iron golf club. The width of the groove may vary between each golf club in a set of iron golf clubs, such that the width of the groove of the long irons is greater that the width of the groove of the middle irons, and the width of the groove of the middle irons is greater than the width of the groove of the short irons.
    Type: Application
    Filed: July 31, 2004
    Publication date: April 21, 2005
    Inventors: Masao Nagai, David Llewellyn, Harry Taylor, Mamoru Saraie, Isamu Toshinari
  • Iron golf club and golf club set
    Publication number: 20040147335
    Abstract: A groove is provided a surface on a cavity portion side of a sole portion in a head portion of an iron golf club, and a thickness of a ball hitting portion in a face portion is made larger than a thickness of a top edge side portion of the face portion and at least as large as a thickness of a sole side portion of the face portion. In a golf club set according to the present invention, the groove has the greatest depth in a long iron golf club, while the groove has the smallest depth in a short iron golf club or no groove is provided in the short iron golf club.
    Type: Application
    Filed: January 14, 2004
    Publication date: July 29, 2004
    Inventors: Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Mamoru Saraie, Kiyotaka Chaen
  • Iron golf club and golf club set
    Patent number: 6709345
    Abstract: A groove is provided a surface on a cavity portion side of a sole portion in a head portion of an iron golf club, and a thickness of a ball hitting portion in a face portion is made larger than a thickness of a top edge side portion of the face portion and at least as large as a thickness of a sole side portion of the face portion. In a golf club set according to the present invention, the groove has the greatest depth in a long iron golf club, while the groove has the smallest depth in a short iron golf club or no groove is provided in the short iron golf club.
    Type: Grant
    Filed: October 12, 2001
    Date of Patent: March 23, 2004
    Assignee: Mizuno Corporation
    Inventors: Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Mamoru Saraie
  • Golf club and method of manufacturing the golf club
    Patent number: 6666779
    Abstract: A golf club according to the present invention comprises a face portion (1) and a neck portion (2), and metal flow lines (3) continue from the face portion (1) to the neck portion (2). These metal flow lines (3) extend in a single direction on the face portion (1). A method of manufacturing a golf club according to the present invention comprises steps of bending a rod member subjected to drawing plastic working on an end and forging the rod member after the bending for integrally molding a face portion (1) and a neck portion (2).
    Type: Grant
    Filed: August 2, 2001
    Date of Patent: December 23, 2003
    Assignees: Mizuno Corporation, Chuo Industries, Ltd.
    Inventors: Mototaka Iwata, Kiyotaka Chaen, Isamu Toshinari, Kenji Kanegawa
  • Golf club sole
    Patent number: D501523
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: February 1, 2005
    Assignee: Mizuno Corporation
    Inventors: Junichi Dogan, Shuichi Noguchi, Isamu Toshinari
  • Golf club head
    Patent number: D502239
    Type: Grant
    Filed: January 12, 2004
    Date of Patent: February 22, 2005
    Assignee: Mizuno Corporation
    Inventors: Junichi Dogan, Shuichi Noguchi, Isamu Toshinari
  • Weight portion for a golf club iron head
    Patent number: D504167
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: April 19, 2005
    Assignee: Mizuno Corporation
    Inventors: Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Mamoru Saraie, Kiyotaka Chaen
  • Golf club iron head
    Patent number: D508722
    Type: Grant
    Filed: September 9, 2003
    Date of Patent: August 23, 2005
    Assignee: Mizuno Corporation
    Inventors: Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Mamoru Saraie, Kiyotaka Chaen
  • Perimeter-weighted golf club back with integrated trapezoidal weight
    Patent number: D547817
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: July 31, 2007
    Assignee: Mizuno Corporation
    Inventors: Mototaka Iwata, Isamu Toshinari, Tomomi Watanabe, Mamoru Saraie, Kiyotaka Chaen
  • Perimeter-weighted back portion with an integrated trapezoidal weight portion for an iron golf club
    Patent number: D552703
    Type: Grant
    Filed: October 11, 2006
    Date of Patent: October 9, 2007
    Assignee: Mizuno Corporation
    Inventors: Motokaka Iwata, Isamu Toshinari, Tomomi Watanabe, Mamoru Saraie, Kiyotaka Chaen
  • Back design for an iron golf club head
    Patent number: D600765
    Type: Grant
    Filed: December 24, 2008
    Date of Patent: September 22, 2009
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Richard Delvac, Isamu Toshinari, Tomoaki Aoki
  • Iron-type golf club head
    Patent number: D641821
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: July 19, 2011
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Isamu Toshinari, Arata Kamo
  • Iron-type golf club head
    Patent number: D650877
    Type: Grant
    Filed: June 8, 2011
    Date of Patent: December 20, 2011
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Isamu Toshinari, Arata Kamo
  • Iron-type golf club head
    Patent number: D682959
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: May 21, 2013
    Assignee: Mizuno USA, Inc.
    Inventors: Mamoru Saraie, Isamu Toshinari, Tomo Aoki, Richard Delvac
  • Iron-type golf club head
    Patent number: D682961
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: May 21, 2013
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Kazuhiko Natori, Isamu Toshinari
  • Iron-type golf club head
    Patent number: D720026
    Type: Grant
    Filed: October 1, 2013
    Date of Patent: December 23, 2014
    Assignee: Mizuno USA, Inc.
    Inventors: David Llewellyn, Isamu Toshinari, Kazuhiro Doi