Patents by Inventor Chang H. Ho

Chang H. Ho 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).

  • Process for making helmets for cyclists
    Patent number: 5376318
    Abstract: A process for making helmets for cyclists which includes steps of a) pre-heating a mold; b) putting a printing ink-coated plastic film or sheet to the lower die of the mold; c) letting the plastic film or sheet be heated to deform and to closely adhered to the cavity on the lower die; d) filling a polyurethane liquid; closing the upper die of the mold; e) putting the mold in a reactor for foaming; f) shape forming; g) mold stripping; i) trimming and vent hole making; and j) packing.
    Type: Grant
    Filed: May 24, 1993
    Date of Patent: December 27, 1994
    Inventor: Chang H. Ho
  • Helmet for cyclist
    Patent number: D363570
    Type: Grant
    Filed: June 24, 1993
    Date of Patent: October 24, 1995
    Inventor: Chang H. Ho