Patents Assigned to Prowell Helmets Ltd.
  • Helmet
    Patent number: D389280
    Type: Grant
    Filed: October 11, 1996
    Date of Patent: January 13, 1998
    Assignee: Prowell Helmets Ltd.
    Inventor: Chang-Hsien Ho
  • Combined neck support and helmet positioner
    Patent number: D402422
    Type: Grant
    Filed: October 25, 1996
    Date of Patent: December 8, 1998
    Assignee: Prowell Helmets Ltd.
    Inventor: Chang-Hsien Ho
  • Sports helmet
    Patent number: D410571
    Type: Grant
    Filed: April 2, 1998
    Date of Patent: June 1, 1999
    Assignee: Prowell Helmets Ltd.
    Inventor: Tung-Feng Lu