Patents by Inventor Fletcher Blackmon

Fletcher Blackmon 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).

  • Arbitrary waveform generator
    Patent number: 5258937
    Abstract: An arbitrary waveform generator is capable of producing pulse or continuous aveform signals. It utilizes an EPROM that sends out selected stored digital signals under control of a microprocessor and auxiliary equipment comprised of a clock and an address sequencer. A digital-to-analog converter receives the digital signals from the EPROM and converts them to analog signals.
    Type: Grant
    Filed: April 13, 1992
    Date of Patent: November 2, 1993
    Assignee: The United States of Amwerica as represented by the Secretary of the Navy
    Inventor: Fletcher A. Blackmon
  • Digital calibration circuit employing composite sine wave signals
    Patent number: 5054039
    Abstract: A digital calibration circuit provides 1/3 octave center frequencies substially in the range of 50 Hz-12.5 kHz (25 tones) simultaneously at the output at repeatable levels. The system converts digital data to an analog representation for use in calibrating hydrophones. The calibration circuit is comprised of a clock section, a counting section, a clearing section, a data storage/transfer section, and a signal conditioning section. The information that is provided to the output in analog form is stored in digital form in an EPROM within the data storage/transfer section.
    Type: Grant
    Filed: August 30, 1990
    Date of Patent: October 1, 1991
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Fletcher A. Blackmon, Robert J. Reid