Patents by Inventor Johan W. Haarman

Johan W. Haarman 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).

  • X-Ray sensitive electrophoretic imagers
    Patent number: 4414679
    Abstract: A grid type substrate is constructed to support an X-ray sensitive material at one side of an electrophoretic display device. The grid structure may be X-ray absorbent material supported between X-ray transparent supports. Various arrangements of the X-ray absorbent grid may be provided.
    Type: Grant
    Filed: March 1, 1982
    Date of Patent: November 8, 1983
    Assignee: North American Philips Corporation
    Inventors: Richard B. Liebert, Johan W. Haarman