Patents by Inventor Chih Hao Yiu

Chih Hao Yiu 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: 5735527
    Abstract: A dart board includes a front and lower portion having one or more inclined apertures for stably receiving and supporting darts. The inclined apertures are each defined by a cone shaped wall member. The cone shaped wall member includes a free end portion of reduced diameter and having one or more slits for forming a number of resilient blades so as to resiliently engage with the dart and so as to stably retain the dart in place. A drawer is slidably engaged in the dart board for receiving elements.
    Type: Grant
    Filed: November 1, 1996
    Date of Patent: April 7, 1998
    Inventor: Chih-Hao Yiu
  • Patent number: 5733210
    Abstract: A scoring apparatus for scoring a table tennis game includes three sensors secured to two tables and a net device of the table tennis game for sensing the striking of a table tennis ball to the tables and to the net device. A processing device is coupled to the sensors for receiving signals from the sensors, and a displayer device is coupled to the processing device for displaying the scores of the players. The displayer device includes two displayer screen fors displaying the scores of two players. The displayer device includes one or more press buttons for calibrating the displayer screens.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: March 31, 1998
    Inventor: Chih-Hao Yiu
  • Patent number: 5613686
    Abstract: A target board includes a center target area and includes a number of cones formed in the surrounding portion. The cones each includes a tip formed in top and each includes a bottom of larger size. The bottoms of three or more cones are engaged with each other so as to define an opening for engaging with a dart. The openings are formed by three or more inwardly curved sides. A number of guide members are formed between every two adjacent cones and each includes a cusp formed in top and each includes two inclined surfaces for guiding the dart into the openings.
    Type: Grant
    Filed: January 2, 1996
    Date of Patent: March 25, 1997
    Inventor: Chih-Hao Yiu
  • Patent number: 5601290
    Abstract: A double bullseye for a dart game is slidably engaged in the dart game for engaging with a number of switch points. The double bullseye includes an outer bullseye and an inner bullseye slidably engaged in the outer bullseye. A cap is secured to the outer bullseye for limiting the sliding movement of the inner bullseye relative to the outer bullseye. The cap includes one or more projections for engaging with the switch points when the cap is inner moved by the outer bullseye. The inner bullseye includes one or more leg extended through the cap for engaging with the switch points. The leg is shorter than the projection so as to be prevented from engaging with the switch points when the outer bullseye is shot by a dart.
    Type: Grant
    Filed: September 18, 1995
    Date of Patent: February 11, 1997
    Inventor: Chih-Hao Yiu
  • Patent number: 5531451
    Abstract: A scoring system for a cricket dart game includes three "8"-shaped display units each having seven strokes. The three display units include twenty one strokes in total and the twenty one strokes are divided into seven groups each having three stokes for indicating three shots of a particular scoring. The display units are good enough for scoring a cricket dart game without installing further light bulbs.
    Type: Grant
    Filed: April 14, 1995
    Date of Patent: July 2, 1996
    Inventor: Chih-Hao Yiu
  • Patent number: 5505459
    Abstract: A dart board includes a scoring area having a number of triangular holes formed by a number of triangular peripheral walls. The triangular peripheral walls each includes three tapered surfaces formed in the inner peripheral portion so as to form a wider front portion and so as to form a narrower rear portion such that the holes each includes a widely opened front portion for effectively receiving and for guiding a dart into the holes. The narrower rear portions of the holes each includes a size smaller than that of the dart for stably retaining the dart in place.
    Type: Grant
    Filed: August 14, 1995
    Date of Patent: April 9, 1996
    Inventor: Chih-Hao Yiu
  • Patent number: 5275418
    Abstract: A target includes a rim, a ring engaged in the rim, a number of depressions formed in the rear portion of the ring, a frame having a number of spaces and a number of fins formed in the outer peripheral portion, a protrusion formed on each of the fins for engagement with the depressions of the ring. The protrusions of the fins are disengaged from the depressions and engaged with the other depressions when the frame is rotated relative to the ring.
    Type: Grant
    Filed: February 23, 1993
    Date of Patent: January 4, 1994
    Inventor: Chih-Hao Yiu
  • Patent number: D378103
    Type: Grant
    Filed: August 21, 1995
    Date of Patent: February 18, 1997
    Inventor: Chih-Hao Yiu
  • Patent number: D386795
    Type: Grant
    Filed: August 5, 1996
    Date of Patent: November 25, 1997
    Inventor: Chih-Hao Yiu
  • Patent number: D390277
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: February 3, 1998
    Inventor: Chih-Hao Yiu
  • Patent number: D390278
    Type: Grant
    Filed: February 25, 1997
    Date of Patent: February 3, 1998
    Inventor: Chih-Hao Yiu
  • Patent number: D393491
    Type: Grant
    Filed: March 4, 1996
    Date of Patent: April 14, 1998
    Inventor: Chih-Hao Yiu