Patents by Inventor James C. Hsien

James C. Hsien 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: 5643102
    Abstract: An improved set of golf clubs wherein the face of the head of each golf club is offset relative to the central axis of the shaft of the golf club so as to provide a more consistent swing for golfers. The golf club set comprises progressively numbered wood clubs and progressively numbered iron clubs inclusive of a pitching wedge and sand wedge. The wood clubs and iron clubs each have correspondingly, progressively shorter and less flexible club shafts as well as correspondingly, progressively larger loft angles between the club faces and the shaft axes beginning with the lowest numbered club and progressing through the highest numbered club. The improvement comprises a set of wood and iron clubs each having at least one to seven and one to ten groups of face progression values, respectively. Each group of face progression values varies in accordance with each other group.
    Type: Grant
    Filed: July 17, 1995
    Date of Patent: July 1, 1997
    Inventor: James C. Hsien
  • Patent number: 5433439
    Abstract: An improved set of golf clubs wherein the face of the head of each golf club is offset relative to the central axis of the shaft of the golf club so as to provide a more consistent swing for golfers. The golf club set comprises progressively numbered wood clubs and progressively numbered iron clubs inclusive of a pitching wedge and sand wedge. The wood clubs and iron clubs each have correspondingly, progressively shorter and less flexible club shafts as well as correspondingly, progressively larger loft angles between the club faces and the shaft axes beginning with the lowest numbered club and progressing through the highest numbered club. The improvement comprises a set of wood and iron clubs each having at least four groups of face progression values. Each group of face progression values varies in accordance with each other group.
    Type: Grant
    Filed: September 15, 1993
    Date of Patent: July 18, 1995
    Inventor: James C. Hsien
  • Patent number: 5082278
    Abstract: A solid club head with a substantial vertical hosel with a horizontal portion extending between a toe portion to a heel portion with an inclined front face and a curved back face. The back face has a contour of variable radii of curvature from a very large radius at the upper reaches of the horizontal portion of the head to a very small radius of curvature at the lower reaches of the horizontal head portion. The back face has several recesses disposed along the expanse of the back face. There are one long upper recess and two lower recesses just below the upper recess coextensive with the long upper recess. Additive masses are insertable into said two lower recesses. The inclined front face has horizontal lines with triangular lands or unmachined lines amid the horizontal lines for proper orientation of the club in the hands of the player.
    Type: Grant
    Filed: April 12, 1990
    Date of Patent: January 21, 1992
    Inventor: James C. Hsien
  • Patent number: 4883274
    Abstract: A solid club head with a substantial vertical hosel with a horizontal portion extending between a toe portion to a heel portion with an inclined front face and a curved back face. The back face has a contour of variable radii of curvature from a very large radius at the upper reaches of the horizontal portion of the head to a very small radius of curvature at the lower reaches of the horizontal head portion. The back face has several recesses disposed along the expanse of the back face. There are one long upper recess and two lower recesses just below the upper recess coextensive with the long upper recess. Additive masses are insertable into said two lower recesses. The inclined front face has horizontal lines with triangular lands or unmachined lines amid the horizontal lines for proper orientation of the club in the hands of the player.
    Type: Grant
    Filed: September 15, 1988
    Date of Patent: November 28, 1989
    Inventor: James C. Hsien
  • Patent number: D328484
    Type: Grant
    Filed: November 14, 1989
    Date of Patent: August 4, 1992
    Inventor: James C. Hsien