Patents by Inventor David L. Druif

David L. Druif 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: 6345946
    Abstract: A fastener which allows for the attachment of two articles without the need for hardware such as a screw, or such as nuts, bolts and washers. The fastener comprises two members—a fastener post which serves as a male member, and a fastener post receiver which serves as a female member. The male post defines two elongated prongs, with each prong having a flange near its end. The female receiver is configured to mate with the prongs of the post. To this end, the receiver has walls which extend from a base, with the walls having a series of teeth for receiving the flanges of the post as the post is advanced into the female receiver. In addition, the walls of the female receiver are separated by channels. The channels allow the walls of the receiver to pivot about the base. This feature, in turn, allows the walls to contract and engage the male post when one attempts to separate the male post from the female receiver.
    Type: Grant
    Filed: August 3, 2000
    Date of Patent: February 12, 2002
    Assignee: Radio Systems Corporation
    Inventors: Christopher E. Mainini, Lawrence E. Towle, William S. Groh, David L. Druif
  • Patent number: D490577
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: May 25, 2004
    Assignee: Radio Systems Corporation
    Inventors: Kurt J. Steinbacher, David L. Druif, Phillip R. Greene