Headphone amplifier
Description
The broken lines in the figures illustrate portions of the headphone amplifier that form no part of the claimed design.
Claims
The ornamental design for a headphone amplifier, as shown and described.
Referenced Cited
U.S. Patent Documents
D342948 | January 4, 1994 | Furui |
D398304 | September 15, 1998 | Murray |
D412705 | August 10, 1999 | Laiacona |
D429717 | August 22, 2000 | Kizawa |
D510338 | October 4, 2005 | Brimhall |
D532425 | November 21, 2006 | Kim |
D552076 | October 2, 2007 | Griffin |
D683714 | June 4, 2013 | Ito |
D746254 | December 29, 2015 | Ito |
D762614 | August 2, 2016 | Matsui |
D773432 | December 6, 2016 | Rowan |
D952603 | May 24, 2022 | Wen |
Patent History
Patent number: D975670
Type: Grant
Filed: Jun 11, 2021
Date of Patent: Jan 17, 2023
Inventor: Naiyong He (Guangzhou)
Primary Examiner: Keli L Hill
Application Number: 29/794,291
Type: Grant
Filed: Jun 11, 2021
Date of Patent: Jan 17, 2023
Inventor: Naiyong He (Guangzhou)
Primary Examiner: Keli L Hill
Application Number: 29/794,291
Classifications
Current U.S. Class:
Radio Receiver, Tuner Or Amplifier, Or Housing Therefor (D14/188)