Patents Assigned to Ketcham & McDougall, Inc.
  • Time delay mechanism for pencil sharpener
    Patent number: 3937239
    Abstract: A time delay mechanism positioned in the pencil sharpener housing near the entry point of the pencil delays the entry of the pencil into the sharpening cavity and simultaneously moves the helical cutting mechanism inwardly into engagement with a leaf spring contact thereby causing actuation of the pencil sharpener motor and rotation of the helical cutting mechanism before the entry of the pencil point into the sharpening cavity.
    Type: Grant
    Filed: March 19, 1975
    Date of Patent: February 10, 1976
    Assignee: Ketcham & McDougall, Inc.
    Inventor: James M. Bosland
  • Date calendar
    Patent number: D245913
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: September 27, 1977
    Assignee: Ketcham & McDougall, Inc.
    Inventor: William Macowski
  • Card file
    Patent number: D248963
    Type: Grant
    Filed: April 16, 1976
    Date of Patent: August 15, 1978
    Assignee: Ketcham & McDougall, Inc.
    Inventor: William Macowski
  • Pencil sharpener
    Patent number: D249152
    Type: Grant
    Filed: February 7, 1977
    Date of Patent: August 29, 1978
    Assignee: Ketcham & McDougall, Inc.
    Inventor: William Macowski
  • Pen receptacle unit
    Patent number: D252034
    Type: Grant
    Filed: May 3, 1976
    Date of Patent: June 5, 1979
    Assignee: Ketcham & McDougall, Inc.
    Inventor: William Macowski