Vacuum tube based audio amplifier

Description

FIG. 1 is an isometric view of the vacuum tube based audio amplifier of the present invention;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a side view of the invention, as seen from the right side of FIG. 2;

FIG. 5 is a side view of the invention, as seen from the left side of FIG. 2; and,

FIG. 6 is a top plan view thereof.

The stippling in the Figures on the front face and the transformer devices represents a pastel color and while shown intermittently is understood to be extended uniformly across the entire surface upon which it is applied.

The wood-pattern lines shown in the Figures indicate that the surface portions of the amplifier comprise a wood appearance. The specific wood grain pattern depicted in the figures is for illustrative purposes only.

The broken-line disclosure in the views is understood to form part of the claimed design.

Claims

CLAIM The ornamental design for a vacuum tube based audio amplifier, as shown and described.

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Inventors:	Lundgard; Eric J. (Midland, MI)
Applicant:	Name City State Country Type Lundgard; Eric J. Midland MI US
Appl. No.:	D/613,548
Filed:	August 10, 2017

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Current U.S. Class:	D14/188
Current International Class:	1403
Field of Search:	;D14/162,167-169,175,179,188,194-198,217,257,265,299,496 ;330/1R,3,4,250 ;381/86,120 ;455/344-351

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References Cited [Referenced By]

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U.S. Patent Documents

1905276	April 1933	Erickson
2497747	February 1950	Valdettaro
D371787	July 1996	Sohn
D489705	May 2004	Sabnani
D508478	August 2005	Nakajima
D525613	July 2006	Masui
D598004	August 2009	Lam
D669992	October 2012	Schafer et al.
D678863	March 2013	Inada
D702211	April 2014	Kim
D702663	April 2014	Kim
D713379	September 2014	Kim
D729762	May 2015	Hu et al.

Primary Examiner: Hill; Keli L
Attorney, Agent or Firm: Mitchell Law PLLC Mitchell; Matthew W.