Patents by Inventor Richard Lichtenberg

Richard Lichtenberg 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).

  • Hemming machine with fusing type slitter
    Patent number: 4594955
    Abstract: A hemming machine has a first station with an ultrasonic slitting device for cutting woven material that has enough thermoplastic content to be cut and fused by an ultrasonic device. At a second station, a hemming device folds and sews the material and by providing only two folds, results in a three layer hem which does not fray because the edge has been fused by the ultrasonic slitting device.
    Type: Grant
    Filed: September 5, 1985
    Date of Patent: June 17, 1986
    Inventor: Richard Lichtenberg