Patents by Inventor Allen R. Gregory

Allen R. Gregory 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).

  • Capless retractable marking pen
    Patent number: 4969764
    Abstract: An improvement is provided for a retractable tip marking pen whereby the tip, in its retracted position, is enclosed in a chamber which prevents drying of the marking fluid. The chamber is provided by an elastomeric sealing member positioned within the outer sheath of the pen adjacent the lower extremity thereof. The sealing member automatically opens when the tip is pushed to its writing position, and closes when the tip is retracted to its stored position.
    Type: Grant
    Filed: March 15, 1990
    Date of Patent: November 13, 1990
    Inventor: Allen R. Gregory
  • Capless retractable marking pen
    Patent number: 4711592
    Abstract: An improvement is provided for a retractable tip marking pen whereby the tip, in its retracted position, is enclosed in a chamber which prevents drying of the marking fluid. The chamber is provided by an elastomeric sealing member positioned within the outer sheath of the pen adjacent the lower extremity thereof. The sealing member automatically opens when the tip is pushed to its writing position, and closes when the tip is retracted to its stored position.
    Type: Grant
    Filed: June 6, 1986
    Date of Patent: December 8, 1987
    Inventor: Allen R. Gregory