Patents by Inventor Keith M. Baxter

Keith M. Baxter 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).

  • Mouth-controlled electronic musical instrument
    Patent number: 11823653
    Abstract: An electronic musical instrument is tonally controlled by the configuration of a user's mouth and lips. The present invention uses a generated frequency signal to excite a first frequency signal from the user's mouth and lips. The present invention then adjusts the generated frequency signal using a phase-locked loop controller to achieve a close match to the natural frequency of the user's mouth and lips. The generated frequency signal is then played back after processing.
    Type: Grant
    Filed: August 12, 2020
    Date of Patent: November 21, 2023
    Inventor: Keith M. Baxter
  • Electronic musical instrument
    Patent number: 8987576
    Abstract: An automatic tuning system for pendulum clocks provides for a separable magnet and ferromagnetic attractor, one positioned on the pendulum and one positioned off of the pendulum and adjustable to change the separation between the two. The magnetic attraction between these elements serves to simulate a changing gravitational force fundamentally affecting pendulum period.
    Type: Grant
    Filed: January 7, 2013
    Date of Patent: March 24, 2015
    Inventor: Keith M Baxter
  • Guitar with high speed, closed-loop tension control
    Patent number: 8440897
    Abstract: A guitar is played during performance by rapid change in the tension of its strings. In one embodiment, rapid, accurate, and repeatable tuning is obtained by a two-step process of adjusting the tension of the string to a stored value which may be then be corrected according to the pitch of the string obtained at later various times during the performance.
    Type: Grant
    Filed: October 15, 2010
    Date of Patent: May 14, 2013
    Inventor: Keith M. Baxter
  • Solar powered crayon recycling toy
    Publication number: 20010050449
    Abstract: A wax molding toy uses a heat retaining housing with a transparent surface to provide wax melting temperatures with typical indoor solar flux intensities.
    Type: Application
    Filed: January 11, 2001
    Publication date: December 13, 2001
    Inventor: Keith M. Baxter
  • Intruder alarm with trajectory display
    Patent number: 5966074
    Abstract: Image data obtained from cameras or the like of a monitored are abstracted into a set of trajectories which may be displayed and used for referencing images or activating alarms based on trajectory location, angle or speed.
    Type: Grant
    Filed: December 16, 1997
    Date of Patent: October 12, 1999
    Inventor: Keith M. Baxter
  • Inflatable cheese wedge hat
    Patent number: 5708983
    Abstract: An inflatable hat provides a concave pocket constructed of flexible material that opens to freely receive the user's head in the manner of a conventional hat by virtue of supports resisting the outward extension of the pocket when the hat is inflated. In one embodiment, the pocket is a cylindrical tube extending between parallel walls of the hat structure. A bowing in of the tube provides varying sizes of hat openings depending on the amount of inflation to provide a comfortable fit to different users.
    Type: Grant
    Filed: March 26, 1997
    Date of Patent: January 20, 1998
    Assignee: Blowhard Industries Inc.
    Inventors: David R. Cross, Keith M. Baxter, Thomas L. Maser
  • Thermally regenerative hot beverage container
    Patent number: 4765393
    Abstract: A beverage container with hollow walls and a hollow central member containing a phase-change material whose phase-change is selected to occur at the approximate temperature considered ideal for drinking, whereby the container regulates the temperature of beverage by absorbing and releasing heat from and to the beverage.
    Type: Grant
    Filed: January 21, 1988
    Date of Patent: August 23, 1988
    Inventor: Keith M. Baxter