Patents by Inventor Ken-Pei Hu

Ken-Pei Hu 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).

  • Encoder wheel arrangement
    Patent number: 5952997
    Abstract: An encoder wheel arrangement, which includes a rack mounted on a circuit board, a positioning block supported on spring elements in the rack, an operation wheel supported on the positioning block and turned by hand to rotate a shaft and a notched disk relative to a photoelectric transmitter and a photoelectric receiver on the circuit board, the operation wheel having a plurality of axial grooves equiangularly spaced around its inside wall and turned with the operation wheel to alternatively pass over two opposite ends of the positioning block of the rack for quick positioning at one of a series of angular positions.
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: September 14, 1999
    Inventor: Ken-Pei Hu
  • Portion of a computer mouse
    Patent number: D420992
    Type: Grant
    Filed: June 2, 1999
    Date of Patent: February 22, 2000
    Inventor: Ken-Pei Hu
  • Computer mouse
    Patent number: D421602
    Type: Grant
    Filed: February 19, 1999
    Date of Patent: March 14, 2000
    Inventor: Ken-Pei Hu