Patents by Inventor Colin R. Edwards

Colin R. Edwards 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).

  • Unidirectional signal paths
    Patent number: 4158147
    Abstract: A circuit element for forming a unidirectional signal path between two signal connections is programmable both to choose the direction of signal travel on the signal path and whether the signal path passes a direct signal or a logical inverse signal. The programming is carried out by applying programming signals to the two signal connection points to cause selective fusing of one or more fusible links.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: June 12, 1979
    Assignee: National Research Development Corporation
    Inventor: Colin R. Edwards
  • Inverters and logic gates employing inverters
    Patent number: 4157480
    Abstract: A so-called "programmable inverter" provides either a direct or an inverse signal path between its input and its output depending on a previously applied programming signal which is arranged to cause selective fusing of a fusible link. Such a circuit element may be incorporated in an input or an output of a logic gate so that a single type of gate may be programmed to perform a selected function from a number of functions.
    Type: Grant
    Filed: July 22, 1977
    Date of Patent: June 5, 1979
    Assignee: National Research Development Corporation
    Inventor: Colin R. Edwards