Patents Assigned to Cathay Pen Corporation
  • Ball point pen writing instrument
    Patent number: 4430014
    Abstract: A ball point pen writing instrument capable of being simply filled in aqueous ink solution and fitted with a ball point pen to be used as an ordinary writing instrument. When the ink is exhausted it can be refilled for use in the same manner as an ordinary fountain pen.
    Type: Grant
    Filed: April 13, 1981
    Date of Patent: February 7, 1984
    Assignee: Cathay Pen Corporation
    Inventor: Kuo L. Tsai
  • Nib replaceable writing instrument
    Patent number: 4406555
    Abstract: A writing instrument with a nib that is easily removed and replaced with a spare unit stored inside the pen holder. A capillary and ink core guide is provided to supply ink from storage to a ball or other writing means.
    Type: Grant
    Filed: May 6, 1981
    Date of Patent: September 27, 1983
    Assignee: Cathay Pen Corporation
    Inventor: Kuo L. Tsai