File:Wilhelm Klinkerfues, 025.jpg
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| Description | US-Patent 139599 A von Karl Gustav Müller und Heinrich Meier, originally invented by Wilhelm Klinkerfues. Improvement in electrical gas-lighting, Patented June 3, 1873. |
| Date | |
| Source | https://www.google.com.pg/patents/US139599 |
| Author | Wilhelm Klinkerfues |
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This work is in the public domain in its country of origin and other countries and areas where the copyright term is the author's life plus 100 years or fewer.  You must also include a United States public domain tag to indicate why this work is in the public domain in the United States.
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| This file has been identified as being free of known restrictions under copyright law, including all related and neighboring rights. | |
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 18:19, 8 February 2018 | | 1,807 × 2,871 (1.09 MB) | Gerd Leibrock (talk | contribs) | == {{int:filedesc}} == {{Information |Description = US-Patent 139599 A von Karl Gustav Müller und Heinrich Meier, originally invented by Wilhelm Klinkerfues. Improvement in electrical gas-lighting, Patented June 3, 1873. |Source= https://www.google... |
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