Verzeichnis der von dem Kaiserlichen Patentamt
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Verzeichnis der von dem Kaiserlichen Patentamt was an annual publication listing approved patents by class.
- Scans from many years, starting in 1881, are available from HathiTrust
- 1893 on Internet Archive
- More on Google Books, e.g. 1913; search
| Original title | Verzeichnis der von dem Kaiserlichen Patentamt |
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| Countries | DE |
| Languages | de |
| Keywords | patents |
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