Patents by Inventor Harold E. Koeln

Harold E. Koeln 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).

  • Patent number: 4786197
    Abstract: A twist actuated writing instrument comprised of a barrel, a cap, a two-directional cam, and an actuator wherein the barrel, the cap, the two-directional cam, and the actuator axially encase a writing element and a spring and wherein the cap may be rotated in either a clockwise or counterclockwise direction relative to the barrel, such that when the cap is rotated in either direction relative to the barrel, the writing element will be advanced to the writing position and when the cap is rotated in the opposite direction relative to the barrel, the writing element will retract.
    Type: Grant
    Filed: June 15, 1987
    Date of Patent: November 22, 1988
    Assignee: Ritepoint
    Inventors: Harold E. Koeln, Michael Lembeck
  • Patent number: 4257713
    Abstract: A writing instrument in a conical configuration is provided which is less easily misplaced and which can be placed in a position of vertical stability if desired. The surface areas of the writing instrument are well adapted to display decorative or promotional indicia of a number of different types, or a combination of both.
    Type: Grant
    Filed: September 22, 1978
    Date of Patent: March 24, 1981
    Assignee: Penn Corporation
    Inventors: Alan E. Sherman, Harold E. Koeln
  • Patent number: 4217712
    Abstract: A writing instrument is provided which, by virtue of its conical configuration, provides an improved display area for decorative or promotional items, particularly those of a novelty nature.
    Type: Grant
    Filed: October 16, 1978
    Date of Patent: August 19, 1980
    Assignee: Penn Corporation
    Inventor: Harold E. Koeln
  • Patent number: 4161374
    Abstract: A twist retractable writing implement wherein a cap threadably engages a barrel and supports a scribe element, rotation of said cap longitudinally displaces said scribe element with reference to the barrel alternatively into extended and retracted condition. An internally grooved annular flange with a tapered base forms a socket for mounting the scribe element to the cap and provides an air passageway to the seated end thereof. A non-circular bore adjacent the opening tip of the barrel receives the writing tip of the scribe element while providing an air passageway into the barrel.
    Type: Grant
    Filed: April 1, 1977
    Date of Patent: July 17, 1979
    Assignee: Penn Corporation
    Inventors: Harold E. Koeln, Walter W. Paige, Jr.