Patents by Inventor Walter J. Betancourt

Walter J. Betancourt 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: 4641923
    Abstract: Disclosed are field sensitive optical displays, and arrangements and methods for inducing fields in the displays and for scanning the displays. In the disclosed embodiments, liquid crystal, optoceramic and electroluminscent materials are utilized. Methods and arrangements for improving the response time of twisted nematic liquid crystal material and for generating color displays are also disclosed. Methods and arrangements are also disclosed for superimposing varying and a dc fields in field sensitive material. Various display patterns such as a movable dot, intersecting lines and a pivoting line can be obtained.
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: February 10, 1987
    Assignee: Control Interface Company Limited
    Inventors: William Bohmer, Walter J. Betancourt, Louis S. Hoffman
  • Patent number: 4493531
    Abstract: Disclosed are field sensitive optical displays, and arrangements and methods for inducing fields in the displays and for scanning the displays. In the disclosed embodiments, liquid crystal, optoceramic and electroluminescent materials are utilized. Methods and arrangements for improving the response time of twisted nematic liquid crystal material and for generating color displays are also disclosed. Methods and arrangements are also disclosed for superimposing varying and a dc fields in field sensitive material. Various display patterns such as a movable dot, intersecting lines and a pivoting line can be obtained.
    Type: Grant
    Filed: April 1, 1983
    Date of Patent: January 15, 1985
    Assignee: Control Interface Company Limited
    Inventors: William Bohmer, Walter J. Betancourt, Louis S. Hoffman