Audio amplifier
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Description
The broken line disclosure in the views forms no part of the claimed design.
Claims
The ornamental design for an audio amplifier, as shown and described.
Referenced Cited
U.S. Patent Documents
D332255 | January 5, 1993 | Tanaka |
D355197 | February 7, 1995 | Farinelli |
D441375 | May 1, 2001 | Hisatsune |
D525969 | August 1, 2006 | Sugihara |
D542241 | May 8, 2007 | Ryu |
D553616 | October 23, 2007 | Tosh |
D564510 | March 18, 2008 | Cox |
D565542 | April 1, 2008 | Han |
D710821 | August 12, 2014 | Marklund |
D761247 | July 12, 2016 | Otsuka |
D766872 | September 20, 2016 | Jeon |
D826337 | August 21, 2018 | Christie |
D839355 | January 29, 2019 | Christie |
Patent History
Patent number: D857646
Type: Grant
Filed: Aug 7, 2017
Date of Patent: Aug 27, 2019
Assignee: D&B AUDIOTECHNIK GMBH
Inventors: Michael Eckstein (Backnang), Fritz Wurster (Backnang)
Primary Examiner: R. Johnson
Application Number: 29/613,007
Type: Grant
Filed: Aug 7, 2017
Date of Patent: Aug 27, 2019
Assignee: D&B AUDIOTECHNIK GMBH
Inventors: Michael Eckstein (Backnang), Fritz Wurster (Backnang)
Primary Examiner: R. Johnson
Application Number: 29/613,007
Classifications
Current U.S. Class:
Radio Receiver, Tuner Or Amplifier, Or Housing Therefor (D14/188)