Patents by Inventor Matthias-Reinhard Koehn

Matthias-Reinhard Koehn 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).

  • Flat input keyboard for data processing machines or the like and process for producing the same
    Patent number: 5748114
    Abstract: A flat input keyboard for data processing machines or the like has the following successive layers, starting from the side facing away from the operation side: a supporting layer (10), an electric switching system (12, 16, 20) with electric contact spots that correspond to a keyboard pattern, a buffer layer (24) and a flexible elastic covering layer (26) provided on the operation side facing away from the electric switching system with a keyboard pattern (28). The supporting layer, the electric switching system, the buffer layer and the covering layer are interconnected at least along their circumference.
    Type: Grant
    Filed: April 24, 1996
    Date of Patent: May 5, 1998
    Inventor: Matthias-Reinhard Koehn