Patents by Inventor William M. Blethen

William M. Blethen 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: 3937890
    Abstract: A remote monitoring terminal is disclosed for connection with a utility meter to encode and store the meter readings in digital form. The terminal can be interrogated to obtain the stored reading in serial form suitable for encoding and transmission over a communication line. Means are provided to prevent the stored meter reading from being lost in the event of a line-power interruption. A communication system is disclosed including a central office and a plurality of such remote monitoring terminals for addressing each of such terminals to retrieve the stored information therein to the central office.
    Type: Grant
    Filed: April 16, 1974
    Date of Patent: February 10, 1976
    Inventors: William M. Blethen, Lee J. Milligan