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:
Sep. 04, 1990
Filed:
Sep. 23, 1988
Masao Shinnai, Matsusaka, JP;
Kazuya Nishikawa, Matsusaka, JP;
Tokio Tsukada, Matsusaka, JP;
Tohru Hirotsu, Matsusaka, JP;
Central Glass Company, Limited, Ube, JP;
Abstract
On a vehicle window glass provided with defogging heater strips, such as automobile rear window glass, the invention provides an antenna of improved efficiency for receiving FM and AM radio broadcast waves. In an area left above the heater strips the antenna is constructed of at least three elements each of which is a conductive strip. The first and main element is a T-shaped element with its horizontal part at a short distance from the upper edge of the window glass. On one side of the vertical part of the T-shaped element, the second element extends horizontally from a point on that vertical part. The third element, which is located on the other side of that vertical part, has a primary part which constitutes at least three sides of a horizontally elongate rectangle and a secondary part which extends horizontally from a point on the vertical part of the T-shaped element and connects with the primary part. A lead extends from a side of the rectangle to a feed point. The antenna is coupled with the heater strips by a conductive line which connects with the heater strips and has a horizontal part that makes capacitive coupling with the horizontal part of the T-shaped element.