Patents Assigned to Polison Corporation
  • Bracket for safety visors
    Patent number: D457987
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: May 28, 2002
    Assignee: Polison Corporation
    Inventor: Chen-San Cheng
  • Safety visor
    Patent number: D458713
    Type: Grant
    Filed: August 10, 2001
    Date of Patent: June 11, 2002
    Assignee: Polison Corporation
    Inventor: Chen-San Cheng
  • Welding helmet
    Patent number: D479631
    Type: Grant
    Filed: November 15, 2002
    Date of Patent: September 9, 2003
    Assignee: Polison Corporation
    Inventor: Chen-San Cheng
  • Protective helmet
    Patent number: D499214
    Type: Grant
    Filed: September 2, 2003
    Date of Patent: November 30, 2004
    Assignee: Polison Corporation
    Inventor: Chen-San Cheng
  • Welding helmet
    Patent number: D499215
    Type: Grant
    Filed: December 29, 2003
    Date of Patent: November 30, 2004
    Assignee: Polison Corporation
    Inventor: Chen-San Cheng
  • Welding mask
    Patent number: D635721
    Type: Grant
    Filed: January 13, 2010
    Date of Patent: April 5, 2011
    Assignee: Polison Corporation
    Inventor: Chen-San Cheng