The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 25, 1983
Filed:
Apr. 13, 1981
Harry G Friedman, Plymouth, MN (US);
Medtronic, Inc., Minneapolis, MN (US);
Abstract
A body implantable electrical stimulator including stimulation impulse developing circuitry and an output system, including active and indifferent electrodes, for delivering the impulses to stimulate a desired body site. The indifferent electrode is formed as an annular member having a regular electrode-forming surface. The annular member may be electrically closed or open, the distal end being insulated in the latter case. In a preferred embodiment, the impulse developing circuitry is housed in an encapsulant and the annular member is partially imbedded in the encapsulant at the periphery of the housing. Two or more annular members may be employed in a multi-channel device to provide isolation between channels.