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. 23, 2014
Filed:
Jul. 20, 2012
Jae-cheol Lee, Yongin-si, KR;
Byung-soo Kim, Seoul, KR;
Joo-moon Youn, Seoul, KR;
Kee-yeong Cho, Seongnam-si, KR;
Jae-cheol Lee, Yongin-si, KR;
Byung-soo Kim, Seoul, KR;
Joo-moon Youn, Seoul, KR;
Kee-yeong Cho, Seongnam-si, KR;
Samsung Electronics Co., Ltd., Suwon-si, KR;
Abstract
A sound output device is provided. The sound output device includes a vacuum tube for amplifying an audio signal; a power supply that supplies power to the vacuum tube; a first switch circuit that selectively connects the power supply to the vacuum tube; and a controller that controls the first switch circuit according to whether the vacuum tube is used.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile