Helical solar tube

Skip to: Description  ·  Claims  ·  References Cited  · Patent History  ·  Patent History
Description

FIG. 1 is a perspective view of the helical solar tube;

FIG. 2 is an end view thereof;

FIG. 3 is the opposite end view thereof;

FIG. 4 is a side view thereof; and,

FIG. 5 is an exploded view thereof.

Claims

The ornamental design for a helical solar tube, as shown and described.

Referenced Cited
U.S. Patent Documents
2831948 April 1958 Fraser
D280234 August 20, 1985 Takeuchi et al.
5682736 November 4, 1997 Chia et al.
D425013 May 16, 2000 Lai
6474858 November 5, 2002 Liao
6902517 June 7, 2005 Brown et al.
D661645 June 12, 2012 Heidtmann
Patent History
Patent number: D721645
Type: Grant
Filed: Sep 25, 2013
Date of Patent: Jan 27, 2015
Inventor: John Michael Brown (Conyers, GA)
Primary Examiner: Derrick Holland
Application Number: 29/468,013
Classifications
Current U.S. Class: Solar Unit Or Component Thereof (D13/102)