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:
Apr. 07, 2026
Filed:
Aug. 25, 2020
Autonetworks Technologies, Ltd., Yokkaichi, JP;
Sumitomo Wiring Systems, Ltd., Yokkaichi, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Ryohei Sawada, Yokkaichi, JP;
Kota Oda, Yokkaichi, JP;
Ken Furuto, Yokkaichi, JP;
Masayuki Kato, Yokkaichi, JP;
AutoNetworks Technologies, Ltd., Yokkaichi, JP;
Sumitomo Wiring Systems, Ltd., Yokkaichi, JP;
Sumitomo Electric Industries, Ltd., Osaka, JP;
Abstract
A heater drive apparatus functions as a power supply control apparatus, and controls power supply to an electrical heating wire. In the heater drive apparatus, a current output circuit and a detection resistor function as a current detection unit, and detect a current flowing through the electrical heating wire. A microcomputer repeatedly calculates an electrical heating wire temperature relating to the electrical heating wire based on the detected current. A drive circuit functions as a switching unit, and switches a switch on or off in accordance with the calculated electrical heating wire temperature.