Patents by Inventor Ina H. Murphy

Ina H. Murphy 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).

  • Hole punching device
    Patent number: 4421000
    Abstract: An improved apparatus is disclosed for simultaneously electrically selecting an array of punches for forming holes in paper suitable for engagement with loose leaf binders or the like. The punches are electrically activated and are mounted in a housing and include a switch mounted on the housing whereby the insertion of paper into the housing will automatically activate the punches which simultaneously form holes in the paper. A corresponding set of indicator lights may be mounted on the housing to signal which punches have been selected.
    Type: Grant
    Filed: May 15, 1981
    Date of Patent: December 20, 1983
    Inventor: Ina H. Murphy