Patents by Inventor Chang-Hsien Ho

Chang-Hsien 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).

  • Safety helmet
    Patent number: D436694
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: January 23, 2001
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D436695
    Type: Grant
    Filed: May 10, 2000
    Date of Patent: January 23, 2001
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D437092
    Type: Grant
    Filed: March 17, 2000
    Date of Patent: January 30, 2001
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D348752
    Type: Grant
    Filed: July 9, 1992
    Date of Patent: July 12, 1994
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D361407
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: August 15, 1995
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D361408
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: August 15, 1995
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D361409
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: August 15, 1995
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D361410
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: August 15, 1995
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D361411
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: August 15, 1995
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D366538
    Type: Grant
    Filed: September 24, 1993
    Date of Patent: January 23, 1996
    Inventor: Chang-Hsien Ho
  • Helmet
    Patent number: D383249
    Type: Grant
    Filed: June 10, 1996
    Date of Patent: September 2, 1997
    Assignee: Glory Metro Tech, Ltd.
    Inventor: Chang-Hsien Ho
  • 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
  • Safety helmet
    Patent number: D414585
    Type: Grant
    Filed: May 22, 1998
    Date of Patent: September 28, 1999
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D424246
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: May 2, 2000
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D426032
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: May 30, 2000
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D426677
    Type: Grant
    Filed: April 21, 1999
    Date of Patent: June 13, 2000
    Inventor: Chang-Hsien Ho
  • Sun visor for a helmet
    Patent number: D427381
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: June 27, 2000
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D427727
    Type: Grant
    Filed: August 16, 1999
    Date of Patent: July 4, 2000
    Inventor: Chang-Hsien Ho
  • Safety helmet
    Patent number: D428534
    Type: Grant
    Filed: June 25, 1999
    Date of Patent: July 18, 2000
    Inventor: Chang-Hsien Ho