Patents by Inventor Jan H. Halm

Jan H. Halm 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).

  • Dental X-ray examination apparatus
    Patent number: 4829548
    Abstract: An X-ray examination apparatus, for example, for dental use, comprises an extraoral radiation entrance screen which is displaceable in a plane which is transverse with respect to a normal thereto. Consequently, distortion-free imaging can be performed for the entire set of teeth and the adjoining regions of the jaws.
    Type: Grant
    Filed: June 18, 1984
    Date of Patent: May 9, 1989
    Assignee: U.S. Philips Corporation
    Inventors: Jan H. Halm, Leonardus H. J. Post, Johannes F. van Otterdijk, Paul F. van der Stelt