Citron Paul, Dickhudt Eugene A: Endocardial electrode. Medtronic, Schwartz Lew, Sivertson Wayne A, September 2, 1975: US3902501 (231 worldwide citation)

A medical electrode uniquely adapted for use as an endocardial electrode. An electrical conductor is encased in a material which is generally inert to body fluids and terminates at an exposed electrically conductive tip. A plurality of pliant tines extend from the electrode adjacent the tip and form ...

Gombrich Peter P, Gallagher John T: Evaluation system for cardiac stimulators. Medtronic, Schwartz Lew, Sivertson Wayne A, November 18, 1975: US3920005 (160 worldwide citation)

A system for evaluation of a cardiac stimulator connected to a patient, the system having means for detecting and differentiating between stimulation pulses and cardiac response pulses, means for determining rate of stimulation pulses and whether such rate falls within a predetermined calibration, a ...

Maurer Donald D: Transcutaneous stimulator and stimulation method. Medtronic, Schwartz Lew, Sivertson Wayne A, June 18, 1974: US3817254 (109 worldwide citation)

A transcutaneous stimulator for stimulating portions of the body. The output of the stimulator is a stimulating pulse having frequency components falling within predetermined frequency band limits so as to optimally excite touch nerve fibres relative to nociceptor or pain receptor nerve fibres.

Williams Terrell M: Dual channel stimulator. Medtronic, Schwartz Lew, Sivertson Wayne A, July 8, 1975: US3893463 (93 worldwide citation)

A body implantable stimulator having two output channels. Pulses from an external pulse generator are transmitted alternately on different carrier frequencies. An implantable receiver, including a frequency detector, separates the frequencies and applies each to a different output channel. The frequ ...

Denniston III Rollin H: Muscle stimulation and/or contraction detection device. Medtronic, Schwartz Lew, Sivertson Wayne, Rappaport Irving, June 11, 1974: US3815611 (89 worldwide citation)

The apparatus detects contraction of muscles of living animals, the contraction causing an elastomer body whose impedance changes when flexed, positioned adjacent muscle to flex when the contraction occurs. When a bias voltage is applied to the elastomer body, any change in impedance is readily dete ...

Friedman Harry G: Body implantable lead. Medtronic, Rappaport Irving S, Schwartz Lew, Sivertson Wayne, January 29, 1974: US3788329 (74 worldwide citation)

A flexible, body-implantable lead section which can be employed as an integral part of a monoplanar electrode system or alternatively as a separate means used to convert bipolar electrode system to a monopolar system. The lead section has at least one electrical conductor. The conductor is covered s ...

Denniston Rollin H, Davis Thomas E: Automatic cardioverting circuit. Medtronic, Schwartz Lew, Sivertson Wayne, April 23, 1974: US3805795 (67 worldwide citation)

Pulse generating apparatus which provides electrical heart-stimulating pulses only in the absence of normal heart activity. If the patient's heart has developed a life threatening arrhythmic condition the inventive apparatus automatically applies an electrical shock to the heart having sufficient ma ...

Wingrove Robert C: Compared count digitally controlled pacemaker. Medtronic, Schwartz Lew, Sivertson Wayne A, September 3, 1974: US3833005 (59 worldwide citation)

A cardiac pacer having adjustable rate and/or pulse width controls controlled by digital means including a first counter for receiving information and storing the data, a second counter connected to clock means, and logic means for comparing the outputs of the first and second counters to determine ...

Maurer Donald D: Time shared stimulator. Medtronic, Schwartz Lew, Sivertson Wayne A, June 10, 1975: US3888261 (44 worldwide citation)

A time shared stimulator which employs a single pulse generator to provide non-simultaneous independently controllable multiple outputs. A train of pulses in which the power level of successive pulses may be controlled is produced from the pulse generator output. Switching circuitry connects the pul ...

Dulebohn David H, Landy Jr Arney, Brandt Roy Earl: Wire electrode electric erosion device. Andrew Engineering Company, Schwartz Lew, Sivertson Wayne A, November 19, 1974: US3849624 (28 worldwide citation)

A device for electrically inducing the cutting of a workpiece with a wire electrode. The workpiece and electrode are moved relative to each other such that the electrode follows a predetermined path on the workpiece. The electrode is inclined and orbits about a vertical line in response to changes i ...