Patent
   D698727
Priority
Jun 10 2011
Filed
Dec 12 2011
Issued
Feb 04 2014
Expiry
Feb 04 2028
Assg.orig
Entity
unknown
2
7
n/a
The ornamental design for a twin vertical-axis wind turbine with automatic wind tracking, as shown and described.

FIG. 1 is a perspective view of a twin vertical-axis wind turbine with automatic wind tracking according to the invention;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a back elevational view thereof;

FIG. 4 is a left-side elevational view thereof;

FIG. 5 is a right-side elevational view thereof;

FIG. 6 is a sectional view thereof, taken along lines 6-6 as indicated in FIG. 5;

FIG. 7 is a top view thereof;

FIG. 8 is a bottom view thereof;

FIG. 9 is a perspective view of a second embodiment of a twin vertical-axis wind turbine with automatic wind tracking according to the invention;

FIG. 10 is a front elevational view thereof;

FIG. 11 is a back elevational view thereof;

FIG. 12 is a left-side elevational view thereof;

FIG. 13 is a right-side elevational view thereof;

FIG. 14 is a sectional view thereof, taken along lines 14-14 as indicated in FIG. 13;

FIG. 15 is a top view thereof; and,

FIG. 16 is a bottom view thereof.

Steel, Dennis Patrick

Patent Priority Assignee Title
10975839, May 23 2018 Vertical axis wind turbines with V-cup shaped vanes, multi-turbine assemblies and related methods and systems
ER6356,
Patent Priority Assignee Title
1441774,
1645855,
4551631, Jul 06 1984 Wind and solar electric generating plant
6710469, Nov 17 2000 Fluid-powered energy conversion device
20110089698,
D587196, Oct 19 2007 Twin wind turbine power system
D625261, Oct 13 2009 PREMIER HOLDING CORP Beverage can-shaped turbine
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Dec 12 2018STEEL, DENNIS PATRICKDIRECTTECH GLOBAL GMBHASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0513030813 pdf
Aug 26 2021DIRECTTECH GLOBAL GMBHWINDQUIET TECHNOLOGIES INC ASSIGNMENT OF ASSIGNORS INTEREST SEE DOCUMENT FOR DETAILS 0573580126 pdf
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