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. 03, 2011
Filed:
Apr. 06, 2000
Kazutaka Inoue, Tsukuba, JP;
Hirotoshi Adachi, Tsukuba, JP;
Kazutaka Inoue, Tsukuba, JP;
Hirotoshi Adachi, Tsukuba, JP;
Hisamitsu Pharmaceutical Co., Inc., Tsukuba-shi, JP;
Abstract
A device for iontophoresis that reduces irritation at the beginning of energization and efficiently supplies an amount of current required for drug administration in a predetermined length of time, is provided. With the device for iontophoresis, the oscillation frequency and duty cycle of a transistorare adjusted at the beginning of energization, thereby controlling a back electromotive force developed across a coilto gradually increase the output voltage. The microcomputercontrols the transistorso as to receive signals from an output voltage detecting circuit that is formed of resistorsandand an output current detecting circuit that is formed of resistorsandand a capacitor, preventing an increasing of the output voltage when the detected output current reaches a limiting value, and preventing an increasing of the output current when the detected output voltage reaches a limiting value.