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:
Oct. 06, 2020
Filed:
Jul. 07, 2017
W. L. Gore & Associates, Co., Ltd., Tokyo, JP;
Yasuhiro Kurihara, Tokyo, JP;
Ryan Kenaley, Newark, DE (US);
Nobuyuki Osugi, Tokyo, JP;
Takayuki Saeki, Tokyo, JP;
Ryosuke Nakamura, Tokyo, JP;
Takafumi Namba, Tokyo, JP;
W. L. Gore & Associates, Co., Ltd., Tokyo, JP;
Abstract
The waterproof sound-transmissive cover is characterized by providing a frequency response curve with a difference between a maximum sound pressure level and a minimum sound pressure level of 13.0 dB or less in the range of frequencies from 3 kHz to 8 kHz, and an insertion loss at 1 kHz of less than 14.0 dB, and said cover comprising: a porous film having (1) a water pressure resistance measured according to JIS L1092 water penetration test method B (high pressure method) of 20 kPa or more, and air permeability measured according to JIS L1096 method A (Frazier type method) of 3.0 cc/cm·sec or more, and (2) a tensile strength measured according to ASTM standards D412 of 5.5N or more.