Patents by Inventor John D. Chang

John D. 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).

  • Methods and apparatus for treating disorders of the ear nose and throat
    Patent number: 11957318
    Abstract: Methods and apparatus for treating disorders of the ear, nose, throat or paranasal sinuses, including methods and apparatus for dilating ostia, passageways and other anatomical structures, endoscopic methods and apparatus for endoscopic visualization of structures within the ear, nose, throat or paranasal sinuses, navigation devices for use in conjunction with image guidance or navigation system and hand held devices having pistol type grips and other handpieces.
    Type: Grant
    Filed: April 29, 2021
    Date of Patent: April 16, 2024
    Assignee: Acclarent, Inc.
    Inventors: Joshua Makower, John Y. Chang, Ketan P. Muni, John H. Morriss, Hung V. Ha, Isaac J. Kim, Julia D. Vrany
  • Ski base and running surface
    Patent number: 5344177
    Abstract: A ski base sheet and ski body are disclosed. The ski base sheet is removable from the ski body and reusable. The ski base sheet is attached to the ski body by using a structured surface. A number of different ski base sheets may be used interchangably on the ski body.
    Type: Grant
    Filed: January 22, 1993
    Date of Patent: September 6, 1994
    Assignee: Minnesota Mining and Manufacturing Company
    Inventors: Forrest J. Rouser, John D. Chang, Mark E. Reeves