File:Pat no 447918 Strowger.jpg

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Description
Deutsch: Patentschrift: Automatic Telephone Exchange
Date
Source Transferred from de.wikipedia to Commons by Saibo using CommonsHelper.
Author Strowger

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A portion of the disclosure of this patent document contains material which is subject to (copyright or mask work) protection. The (copyright or mask work) owner has no objection to the facsimile reproduction by any­one of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all (copyright or mask work) rights whatsoever.

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العربيَّة | English | español | 中文 | +/−

Original upload log

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The original description page was here. All following user names refer to de.wikipedia.
  • 2005-05-18 12:39 Matthias Bock 425×640× (53304 bytes) Automatic Telephone Exchange andere Version: Automatic_Telephone_Exchange.jpg PD da vor dem 1. Januar 1923 veröffentlicht

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current03:43, 13 August 2010Thumbnail for version as of 03:43, 13 August 2010425 × 640 (52 KB)File Upload Bot (Magnus Manske) (talk | contribs) {{BotMoveToCommons|de.wikipedia|year={{subst:CURRENTYEAR}}|month={{subst:CURRENTMONTHNAME}}|day={{subst:CURRENTDAY}}}} {{Information |Description={{de|Automatic Telephone Exchange andere Version: Automatic_Telephone_Exchange.jpg PD da vor dem 1. Januar

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