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. 27, 1977
Filed:
May. 17, 1976
William A Cole, Brantford, CA;
Unitron Industries Ltd., Kitchener, CA;
Abstract
A hearing aid having a two port microphone for adjustable directivity. The microphone front port is connected to a front port in the casing by a soft resilient rubber tube. The microphone rear port is connected by another soft resilient rubber tube to an outlet in the top of the casing, which outlet is covered by a slider. The slider has a channel communicating with the outlet and having front and rear openings separated by a divider wall. Depending on the position of the slider, the outlet connects with either the front or rear channel opening, controlling the directivity of the aid. The microphone is supported by the rubber tubes, which isolate it from the remainder of the aid.