Mutterkompass (German Wikipedia)

Analysis of information sources in references of the Wikipedia article "Mutterkompass" in German language version.

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160th place

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  • Patent US1242065: Ship's Gyroscopic Compass Set. Angemeldet am 25. September 1909, veröffentlicht am 2. Oktober 1917, Anmelder: Sperry Gyroscope Co, Erfinder: E. A. Sperry.