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• Patent GB-1910-21189
  |Inventors=Olof HELSING |Applicant person=Olof Helsing
  500 bytes (60 words) - 01:51, 25 January 2024
• Patent US-1912-1018190
  |Inventors=Olof HELSING |Applicant person=Olof Helsing
  597 bytes (71 words) - 09:27, 22 April 2019
• Patent FR-1911-420416
  |Inventors=Olof Helsing |Applicant person=Olof Helsing
  819 bytes (107 words) - 12:42, 27 March 2019