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- 13:27, 2 June 2026 Louis talk contribs created page File:CRW-falsepos-tesla-valve-patent.png (Drawings from Nikola Tesla US Patent 1,329,559 (Valvular Conduit, 1920). Source: https://patents.google.com/patent/US1329559A . License: public domain (published 1920).)
- 13:27, 2 June 2026 Louis talk contribs uploaded File:CRW-falsepos-tesla-valve-patent.png (Drawings from Nikola Tesla US Patent 1,329,559 (Valvular Conduit, 1920). Source: https://patents.google.com/patent/US1329559A . License: public domain (published 1920).)