Patents by Inventor Ching-Tai Yen

Ching-Tai Yen 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: 6047968
    Abstract: An electronic dart board includes an outer frame shell having a plurality of partition ribs defining a set of scoring chambers, and a set of base blocks respectively mounted in the scoring chambers, wherein a set of block holders are respectively nested in the scoring chambers to hold the base blocks in the respective scoring chambers, the block holders fitting the scoring chambers respectively, each block holder having a plurality of less at a bottom side and at least one locating rib respectively engaged into a respective locating groove on the base blocks.
    Type: Grant
    Filed: July 29, 1998
    Date of Patent: April 11, 2000
    Inventors: Kuo-Hui Lu, Ching-Tai Yen
  • Patent number: 5967915
    Abstract: A dart having a shaft with a flight, a tip member, and a metal barrel connected between the shaft and the tip member, wherein the tip member has a rigid, cylindrical, solid core, and a hollow cylindrical shell receiving the rigid core, the hollow cylindrical shell having an outer thread at the rear end thereof threaded into a screw hole on one end of the metal barrel, a plurality of recessed portions equiangularly spaced around the periphery of the front end thereof, and a plurality of toothed annular portions raised around the periphery and arranged in parallel between the recessed portions and the outer thread for positioning in studs on a dart board, the recessed portions having a water drop-like shape and a depth gradually reduced from the front end of the cylindrical shell toward the toothed annular portions for guiding the tip member into engagement with the studs on the dart board.
    Type: Grant
    Filed: February 19, 1998
    Date of Patent: October 19, 1999
    Inventors: Kuo-Hui Lu, Ching-Tai Yen
  • Patent number: 5718433
    Abstract: An improved central score block structure for electronic dart games includes a primary score block corresponding to a double bull's eye, a secondary score block corresponding to a bull's eye, and a plurality of resilient elements for supporting respective urge posts of the score blocks. The secondary score block has a slightly tapered central hole having a flanged baffle ring at an outer end. The primary score block is inserted into the central hole of the secondary score block such that its front and rear ends are properly checked by the front and rear ends of the central hole while capable of free displacement therein. The primary score block and the secondary score block will individually respond to a dart hitting the respective rings represented thereby to display the correct score.
    Type: Grant
    Filed: October 21, 1996
    Date of Patent: February 17, 1998
    Inventors: Kuo-Hui Lu, Ching-Tai Yen