Patents Assigned to T. H. Charters, Inc.
  • 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