US D1,020,681 S
Headphone amplifier
Paul Weinreich, Vienna (AT); Philipp Schuster, Vienna (AT); and Alexander Chatt, Gramatneusiedl (AT)
Assigned to AUSTRIAN AUDIO GMBH, Vienna (AT)
Filed by Austrian Audio GmbH, Vienna (AT)
Filed on Nov. 2, 2022, as Appl. No. 35/516,052.
Int. Filing Date Nov. 2, 2022
Int. Reg. No. DM/226042
Int. Reg. Date Nov. 2, 2022
Int. Reg. Pub. Date Jan. 20, 2023
Term of patent 15 Years
LOC (14) Cl. 14 - 03
U.S. Cl. D14—188
OG exemplary drawing
 
The ornamental design for a headphone amplifier, as shown and described.