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:
May. 10, 1994
Filed:
May. 18, 1992
Applicant:
Inventor:
John L Haynes, Chapel Hill, NC (US);
Assignee:
Becton, Dickinson and Company, Franklin Lakes, NJ (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
A61N / ;
U.S. Cl.
CPC ...
604 20 ; 607154 ;
Abstract
An iontophoresis system includes an iontophoretic drug delivery device for placement against the skin of a patient and having at least one segmented electrode, and a circuit for controlling and equalizing current passing through each of a plurality of electrode segments. The current controlling circuit includes a plurality of constant current sources, each of which is electrically coupled to a corresponding one of the electrode segments. The constant current sources are selected such that substantially the same amount of current flows through each electrode segment independent of the impedance of the skin of the of the patient.