Patents by Inventor Harry V. Nguyen

Harry V. Nguyen 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: 4914859
    Abstract: Mechanism primarily suited to automatic sliding door applications wherein at least a pair of object presence sensing detectors, preferably of the ultra-sonic transducer type are arranged to be placed in linear spaced relation to one another effective to cast sonic beams produced thereby spanning the doorway to which applied. So as to assure satisfactorily a beam path to be intercepted by an object stationary or moving in the beams, they are purposely overlapped. The door upon being operatively moved by motion sensing detectors or manual means acts at different opening positions to switch the object sensing detectors on and upon reverse closing positions switches the object sensing detectors off.
    Type: Grant
    Filed: September 23, 1988
    Date of Patent: April 10, 1990
    Assignee: Lanson Electronics, Inc.
    Inventors: Daniel C. Gionet, Lance Wikkerink, Harry V. Nguyen
  • Patent number: 4577437
    Abstract: Mechanism for automatic swing doors including three motion detectors, two associated with the approach side of the door and one on the swing side of the door, with the detectors on the approach side effective, when activated, to open the door and the detector on the swing side effective, when activated, to slow down the moving door.
    Type: Grant
    Filed: November 26, 1984
    Date of Patent: March 25, 1986
    Assignee: Lanson Electronics, Inc.
    Inventors: Daniel C. Gionet, Harry V. Nguyen