Patents by Inventor David T. K. Huat

David T. K. Huat 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).

  • Angle/level meter
    Patent number: 4462167
    Abstract: A hand-held instrument for leveling, and indicating and measuring angles for use with an anchored guide string, including a case, a fixed scale and a pendulum-activated indicator mounted in the case, a disc-shaped string direction sensor member rotatably mounted in the case and having a string alignment mark, and an aperture with peripherally located case axis marks for determining coincidence between the string alignment and case axis marks.
    Type: Grant
    Filed: August 7, 1981
    Date of Patent: July 31, 1984
    Inventor: David T. K. Huat