Patents by Inventor Wen-Ta Chang

Wen-Ta Chang 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).

  • Electronic depth gauge with variable electrical resistance sensing
    Patent number: 7895767
    Abstract: A digital depth gauge apparatus is provided for measuring a depth of a hole in, or surface of, an object using a variable-resistance sensor. The apparatus comprises an elongated reader body that includes a distal end and a proximal end having a longitudinal axis and a user interface including a display and at least one actuator that controls operation of at least one of the display and the apparatus. The apparatus includes a probe that extends from the distal end of the reader body, the probe including a tip for locating a distal surface of the object. The reader body proximal end is configured to abut an other surface of the object. An electrical resistance-based sensor is provided to determine an extension distance of the probe from the body.
    Type: Grant
    Filed: September 14, 2009
    Date of Patent: March 1, 2011
    Assignee: Eidosmed LLC
    Inventors: Michael Harshbarger, John Y. S. Kim, Mu-Jen Wang, Wen-Ta Chang
  • ELECTRONIC DEPTH GAUGE WITH VARIABLE ELECTRICAL RESISTANCE SENSING
    Publication number: 20100154238
    Abstract: A digital depth gauge apparatus is provided for measuring a depth of a hole in, or surface of, an object using a variable-resistance sensor. The apparatus comprises an elongated reader body that includes a distal end and a proximal end having a longitudinal axis and a user interface including a display and at least one actuator that controls operation of at least one of the display and the apparatus. The apparatus includes a probe that extends from the distal end of the reader body, the probe including a tip for locating a distal surface of the object. The reader body proximal end is configured to abut an other surface of the object. An electrical resistance-based sensor is provided to determine an extension distance of the probe from the body.
    Type: Application
    Filed: September 14, 2009
    Publication date: June 24, 2010
    Applicant: Eidosmed LLC
    Inventors: Michael Harshbarger, John Y.S. Kim, Mu-Jen Wang, Wen-Ta Chang
  • Handheld surgical depth instrument with rectangular body
    Patent number: D634843
    Type: Grant
    Filed: October 2, 2009
    Date of Patent: March 22, 2011
    Assignee: Eidosmed LLC
    Inventors: John Y. S. Kim, Michael Harshbarger, Mu-Jen Wang, Wen-Ta Chang