Patents by Inventor Aloysius Johannes van Riet

Aloysius Johannes van Riet 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).

  • Patent number: 4017157
    Abstract: The apparatus includes a liquid crystal cell having transparent front and back walls with transparent electrodes on their facing sides and a liquid crystal material between the walls. The electrodes are segmented into matrix elements according to the cumulative pattern of all characters desired to be displayed or recorded, and are electrically addressable in response to selection circuitry. The front wall is in the form of a fiber-optic plate comprising a plurality of parallel arranged optical fibers. The apparatus is particularly useful to display or record measurement data, such as from a weighing device.
    Type: Grant
    Filed: March 26, 1975
    Date of Patent: April 12, 1977
    Assignee: Maatschappij Van Berkel's Patent N.V.
    Inventor: Aloysius Johannes van Riet