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Patent
D801168
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Priority
Jun 01 2016
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Filed
Jun 01 2016
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Issued
Oct 31 2017
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Expiry
Oct 31 2032
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Assg.orig
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Entity
unknown
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5
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18
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n/a
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The ornamental design for a torsion spring to aid in keeping an interior door open, as shown and described.
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FIG. 1 is a perspective of a torsion spring to aid in keeping an interior door open showing the design;
FIG. 2 is a side elevational view thereof;
FIG. 3 is another side elevational view thereof;
FIG. 4 is a bottom elevational view thereof; and
FIG. 5 is a top elevational view thereof;
FIG. 6 is an end elevational view thereof; and,
FIG. 7 is another end elevational view thereof.
Vavrinak, Robert, Vavrinak, Jacque
Patent |
Priority |
Assignee |
Title |
1715590, |
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2037411, |
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3339225, |
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3825973, |
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4823473, |
Sep 19 1986 |
Illinois Tool Works Inc |
Extensometer for material testing machine |
4894019, |
Jun 16 1988 |
Delta Systems, Inc. |
Torsion spring shorting connector |
5031270, |
Mar 15 1990 |
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Friction hinge |
5649339, |
Jul 29 1996 |
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Door closing device |
5826306, |
Oct 28 1997 |
FCA US LLC |
Sliding door center adjustable hinge |
6205618, |
Jul 09 1999 |
HANGER SOLUTIONS, LLC |
Hinge |
6553623, |
Mar 27 2001 |
|
Automatic pivot door opener |
7011329, |
Mar 08 2004 |
Yoder Brake & Manufacturing Company |
Tow bar with torsion spring lift assist and method |
7520022, |
Apr 07 2005 |
Bobrick Washroom Equipment, Inc. |
Spring and hinge assembly for installing a door on toilet partitions |
8671521, |
May 06 2010 |
Robert F., Irwin |
Control motion hinge with torsion spring |
8756762, |
Jan 18 2011 |
Samsung Electronics Co., Ltd. |
Tilt angle switchable hinge assembly for portable electronic devices |
9163438, |
May 24 2013 |
Maxtech Consumer Products Limited |
Door stay |
9297193, |
Aug 15 2015 |
|
Door opener aid |
D533447, |
Feb 06 2004 |
SUGATSUNE KOGYO CO , LTD |
Door stay |
Executed on | Assignor | Assignee | Conveyance | Frame | Reel | Doc |
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Maintenance Fee Events |
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Maintenance Schedule |
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