Patents by Inventor David M Spaulding

David M Spaulding 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: 4004097
    Abstract: A device for automatically reading one or more meters at a remote location and supplying the information read over telephone lines to a central station includes a coupler effective on command from the central station to furnish power to the meter reading device from the telephone lines and to energize the device to duplicate the readings of the meter counters in sequence to respective registers, from which the readings are encoded in an encoder effective to transmit the information through the coupler and over the telephone lines to a central station by frequency-shift modulation, and to repeat the message until signalled by the central station to stop.
    Type: Grant
    Filed: January 3, 1975
    Date of Patent: January 18, 1977
    Assignee: Badger Meter, Inc.
    Inventor: David M Spaulding