Patents by Inventor Doug L. Haugen

Doug L. Haugen 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).

  • Safety scalpel
    Patent number: 5330492
    Abstract: A surgical instrument comprised of a handle, a blade fixed to the forward end of the handle, and a spring-biased retractable sheath which is received within the handle. A mechanism is provided for retracting the sheath within the handle by depressing a single button on the upper surface of the handle, such that the sheath is retracted against the force of the spring as the button is depressed, and upon release of the button returns the sheath automatically to its released position covering the blade. Additionally, a mechanism is provided for resisting accidental exposure of the blade.
    Type: Grant
    Filed: October 21, 1992
    Date of Patent: July 19, 1994
    Assignee: DLH Concepts, Inc.
    Inventor: Doug L. Haugen