Anti-ligature lock
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The back surface of the anti-ligature lock is substantially flat for mounting against a door and is not shown. The back surface of the anti-ligature lock forms no part of the claimed design.
The broken lines in the illustrations show environmental structure comprising a door and latchbolt and are not a part of the design sought to be patented.
Claims
The ornamental design for an “anti-ligature lock,” as shown and described.
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Type: Grant
Filed: May 10, 2012
Date of Patent: Oct 1, 2013
Assignee: Sargent Manufacturing Company (New Haven, CT)
Inventors: Darren C. Eller (East Lyme, CT), Ryan Piantek (Middletown, CT), Dan Riley (Easton, CT), Andrew Geraci (Branford, CT)
Primary Examiner: Prabhakar Deshmukh
Application Number: 29/420,522