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. 28, 1999
Filed:
May. 15, 1997
Matsushita Electric Industrial Co., Ltd., Osaka, JP;
Abstract
A casing for audiovisual equipment presents an outer appearance giving the impression of integrating a hole area formed of a plurality of sound transmitting fine holes with the casing, thereby making the hole area unnoticeable. This allows a viewer to easily concentrate on the screen by eliminating anything noticeable and distributing from the area surrounding the screen, and also gives the outside of the casing a luxurious appearance. In order to make the hole area unnoticeable, maintain good volume and quality of sound from the speaker, and arrange the diameter .o slashed.d mm of the tapered fine holes to be practically the smallest, the relationship between the diameter .o slashed.d mm and the thickness T mm of the casing must be expressed by the following formula: (1/6).times.T mm.ltoreq..o slashed.d mm.ltoreq.0.5 mm. When the fine holes are formed to be straight, the relationship between the diameter .o slashed.ds mm and the thickness T mm of the casing must be expressed by the following formula: (1/5).times.t mm .ltoreq..o slashed.ds mm.ltoreq.0.5 mm.