Patents by Inventor Norman R. Hagfors

Norman R. Hagfors 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).

  • Electronic tissue stimulator with output signal controls
    Patent number: 4237899
    Abstract: In a transcutaneous nerve stimulating apparatus, the stimulating pulse wave form is shaped and manipulated to accommodate specific physiological parameters, and to allow multiple non-interfering electrode administrations. The stimulating pulse wave form, of desired pulse rate, pulse duration, and pulse amplitude, optionally includes successive pulses of alternating plurality, which may all be coupled to a single electrode, alternately coupled to plural electrodes, or the like. Pulse decay is controlled, as is pulse rise time. Voltage regulation is provided to the pulse generation apparatus.
    Type: Grant
    Filed: September 26, 1978
    Date of Patent: December 9, 1980
    Assignee: Stimtech, Inc.
    Inventors: Norman R. Hagfors, John W. Keller, Jr.