English: Exhibit in the Telephone Museum - Waltham, Massachusetts, USA. As a utilitarian object, this exhibit is NOT subject to copyright laws. Instead it is subject to Industrial Design Rights; see Industrial Design Right for more information. If this object was ever covered by a design patent, that patent has expired, and thus this image is in the public domain.
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse
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