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. 16, 2000
Filed:
Dec. 05, 1997
Masahiro Ohnishi, Isehara, JP;
Masaru Shiina, Kanagawa, JP;
Yoji Nagayama, Matsusaka, JP;
Osamu Ueda, Tokyo, JP;
Asahi Glass Company Ltd., Tokyo, JP;
Nissan Motor Co., Ltd., Yokohama, JP;
Central Glass Company, Limited, Ube, JP;
Clarion Co., Ltd., Tokyo, JP;
Abstract
A glass antenna device for an automobile including a rear window glass sheet; an electric heating type defogger formed on the glass sheet, which is provided with heater strips and positive and negative bus bars for feeding a current to the heater strips; and a noise filter including at least a coil, which is connected between the positive bus bar and a positive terminal of a d.c. power source for the defogger. The negative bus bar is grounded to the automobile body, and antenna conductors are provided in a region in the rear window glass sheet other than the region where the defogger is formed. An antenna conductor element of the antenna conductors extends substantially parallel to the heater strips of the defogger, is more than half in length than a width of the rear window glass sheet, and is located in the range of 15 mm-50 mm apart from an end heating strip of the heating strips of the defogger nearest to the antenna conductor element. The coil has an inductance value in the range of 0.5-10 .mu.H.