Patents by Inventor Thomas H. Charters

Thomas H. Charters 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).

  • Transcutaneous nerve block device
    Patent number: 4938223
    Abstract: A transcutaneous electrical nerve block device generates an improved stimulation signal waveform to provide improved pain relief. Bursts of stimuli include stimuli having waxing and waning amplitudes which bear a consistent relationship to the magnitude of the stimuli burst, the bursts of stimuli being more tolerable at higher intensities. The bursts of stimuli are further modulated in amplitude to aid in prevention of adaptation by the patient to the stimulation.
    Type: Grant
    Filed: March 28, 1988
    Date of Patent: July 3, 1990
    Assignee: T. H. Charters, Inc.
    Inventors: Thomas H. Charters, Fritz L. Jenkner
  • Method and apparatus for muscle stimulation
    Patent number: 4724842
    Abstract: An exercise machine or dynamometer is provided with control apparatus for ascertaining the physical position of a patient during an exercise. The patient is then electrically stimulated over selected ranges of motion in order to aid in the exercise.
    Type: Grant
    Filed: June 6, 1984
    Date of Patent: February 16, 1988
    Inventor: Thomas H. Charters