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Hagfors Norman R: Apparatus for delivering electrical stimulation energy to body-implanted apparatus with signal-receiving means. March 12, 1974: US3796221 (252 worldwide citation)

An apparatus for delivering electrical stimulation energy to body-implanted apparatus with signal-receiving means is described which is particularly useful in implanted devices, including nerve and muscle stimulators, artificial organs, and certain electro-mechanical devices such as implanted dispen ...


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Hagfors Norman R, Hymes Alan C: Method and structure of preventing and treating ileus, and reducing acute pain by electrical pulse stimulation. Stimulation Technology, Simkanich John J, October 14, 1975: US3911930 (188 worldwide citation)

The disclosure is directed to the method and structure of artifically inducing the return of arrested body functions caused by paralytic ileus and pain associated therewith after surgery or accidental trauma on the human body. The equipment is in the form of electronic circuits producing a generally ...


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Hagfors Norman R: Medical-electronic stimulator, particularly a carotid sinus nerve stimulator with controlled turn-on amplitude rate. Medtronic, February 29, 1972: US3645267 (88 worldwide citation)

Electronic circuitry for providing electrical stimulation signals to a selected portion of the body including circuitry for automatically gradually increasing the amplitude of only the initial output stimulating signals to a predetermined level which is maintained until turnoff.


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Hagfors Norman R: Implatable electrode. Medtronic, April 11, 1972: US3654933 (68 worldwide citation)

An improved electrode for implantation into a body including one or more electrical conductor leads adapted to be connected to a source of electrical signal, and one or more flexible electrodes attached to the leads, so that the electrodes may be bent around the portion of the body to which they are ...


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Hagfors Norman R, Keller John W Jr: Stimulateur electronique des tissus cutanes, avec regulateur dimpulsions, Electronic tissue stimulator with output signal controls. Stimtech, SWABEY OGILVY RENAULT, January 19, 1982: CA1116701

AbstractElectronic Tissue Stimulator WithOutput Signal ControlsIn a transcutaneous nerve stimulating apparatus, thestimulating pulse wave form is shaped and manipulated toaccommodate specific physiological parameters, and to allowmultiple non-interfering electrode administrations. Thestimulating pul ...


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Hagfors Norman R, Hymes Alan C: Appareil electrique generateur dimpulsions, Apparatus for electrical pulse stimulation. Stimulation Technology, March 13, 1979: CA1050617

ABSTRACT OF THE DISCLOSURE A method and structure of artificially inducing thereturn of arrested body functions caused by paralytic ileusand pain associated therewith after surgery or accidentaltrauma on the human body. The equipment is in the form ofelectronic circuits producing a generally rectang ...