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Create the page "Hans Roettges" on this wiki! See also the search results found.

  • Patent GB-1909-27892
    |Inventors=Hans Roettges |Applicant person=Hans Roettges
    702 bytes (87 words) - 16:14, 25 October 2021
  • Patent US-1911-1011083
    |Inventors=Hans Roettges |Applicant person=Hans Roettges
    658 bytes (80 words) - 04:01, 22 April 2019
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