Telephone intercom system
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The broken lines in the figures depict unclaimed environment and form no part of the claimed design.
Claims
The ornamental design for a telephone intercom system, as shown and described.
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Type: Grant
Filed: Apr 3, 2013
Date of Patent: Sep 22, 2015
Assignee: Unify GmbH & Co. KG (Munich)
Inventor: Stefan Hillenmayer (Munich)
Primary Examiner: Caron D Veynar
Assistant Examiner: Holly E Thurman
Application Number: 29/451,517