Patents by Inventor Peter Guethner

Peter Guethner 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).

  • Acoustic screen scan microscope for the examination of an object in the short-range field of a resonant acoustic oscillator
    Patent number: 5212987
    Abstract: An acoustic scanning microscope uses damping of a resonant acoustic oscillator and an acoustic near-field effect. In a preferred embodiment, a 32 KHz tuning fork serving as an acoustic oscillator with a 50 nm point achieves a vertical resolution of 5 nm and a horizontal resolution of 50 nm in the case of a minimum distance of approximately 50 nm. Frequency or amplitude variation of the resonant acoustic oscillator can be used. The acoustic near-field effect is dependent on the coupling medium, e.g., air, and the pressure, e.g., normal pressure.
    Type: Grant
    Filed: November 15, 1991
    Date of Patent: May 25, 1993
    Assignee: Hommelwerke GmbH
    Inventors: Klaus Dransfeld, Ulrich Fischer, Peter Guethner, Knut Heitmann