John Adolphus Etzler (German Wikipedia)

Analysis of information sources in references of the Wikipedia article "John Adolphus Etzler" in German language version.

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agora.qc.ca

Patent US2396A: Mode of Propelling Locomotives by stationary Power. Veröffentlicht am 23. Dezember 1841, Erfinder: John A. Etzler.‌
Patent US2533A: Navigating and Propelling Vessels by the Action of the Wind and Waves. Angemeldet am 20. November 1841, veröffentlicht am 1. April 1842, Erfinder: John A. Etzler.‌