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. 13, 1997
Filed:
Dec. 11, 1995
Yoshinori Matsuoka, Osaka, JP;
Harunori Murakami, Osaka, JP;
Nippon Sheet Glass Co., Ltd., , JP;
Abstract
A window glass antenna device defrosting heaters for use as part of a reception antenna on an automobile window glass panel. The defrosting heaters include at least first and second heaters each comprising a plurality of heater wires disposed on the window glass panel, a first bus bar interconnecting ends of the heater wires, and a second bus bar interconnecting opposite ends of the heater wires. A first choke coil is connected between the first bus bars of the first and second heaters and a battery, and disposed near the first bus bars, and a second choke coil is connected between the second bus bars of the first and second heaters and the battery, and disposed near the second bus bars. The first choke coil has at least two windings disposed around a core, the windings being connected respectively to the first bus bars of the first and second heaters such that magnetic fluxes generated in the core by a first electric current flowing through the first heater and a second electric current flowing through the second heater will be canceled. The second choke coil has at least two windings disposed around a core, the last-mentioned windings being connected respectively to the second bus bars of the first and second heaters such that magnetic fluxes generated in the core by the first electric current flowing through the first heater and the second electric current flowing through the second heater will be canceled.