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


Original title Verzeichnis der von dem Kaiserlichen Patentamt
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Countries DE
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