Patents by Inventor Ka Hei Wong

Ka Hei Wong 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).

  • Pickup system for bridge of stringed musical instrument
    Patent number: 5911171
    Abstract: A bridge for stringed instruments having a central slotted opening for receipt of the blades of a pickup device such that the blades are adapted to move laterally back and forth and forwardly and back within the opening so as to vary the sound achieved by the bridge.
    Type: Grant
    Filed: March 13, 1998
    Date of Patent: June 8, 1999
    Inventor: Ka Hei Wong
  • Tamper indicating label
    Patent number: 5893587
    Abstract: A tamper indicating label including an upper sheet having an adhesive lower surface detachably attached to a backing sheet and divided into separable sections by a weakened line such that indicia such as the user's signature can be inscribed on the face of the sheet and across the weakened line such that one of the sections can be separated from the backing sheet and applied to the opening seam of an article such as a suitcase and the remaining section utilized as a receipt.
    Type: Grant
    Filed: August 12, 1997
    Date of Patent: April 13, 1999
    Inventor: Ka Hei Wong
  • Musical instrument body
    Patent number: D385901
    Type: Grant
    Filed: October 17, 1996
    Date of Patent: November 4, 1997
    Inventor: Ka Hei Wong
  • Modern chair
    Patent number: D806425
    Type: Grant
    Filed: September 28, 2016
    Date of Patent: January 2, 2018
    Inventor: Ka Hei Wong
  • Modern table lamp
    Patent number: D841212
    Type: Grant
    Filed: September 11, 2017
    Date of Patent: February 19, 2019
    Inventor: Ka Hei Wong
  • Piano bench
    Patent number: D858126
    Type: Grant
    Filed: July 23, 2018
    Date of Patent: September 3, 2019
    Inventor: Ka Hei Wong