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:
Dec. 19, 1989
Filed:
Dec. 02, 1988
Bakulesh B Patel, Coral Springs, FL (US);
Motorola, Inc., Schaumburg, IL (US);
Abstract
A speaker grille assembly (800) includes a speaker grille 410), a felt (200), and a speaker (300). The speaker grille has a front surface (420), and a rear surface (430). The speaker grille (410) has plurality of equally spaced channels (440) for passage of sound. The sound channels (440) are formed such that that the rear surface port (422) is substantially larger than front surface port (411) thereby enhancing acoustic power transfer by increasing the effective sound passage space. The sound channels (440) can be formed such that the passage through the grille (410) are provided with either gradual or sudden transition from front port (411) to the rear port (422) resulting in a larger rear surface apertures.