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Ull màgic (Catalan Wikipedia)

Analysis of information sources in references of the Wikipedia article "Ull màgic" in Catalan language version.

refsWebsite
Global rank Catalan rank
1uspto.gov
1,459th place
826th place
1radiomuseum.org
low place
low place

radiomuseum.org

uspto.gov

patimg2.uspto.gov

  • Herbert M. Wagner of R.C.A. invented the familiar form of the "magic eye" tuning vacuum tube: H.M. Wagner, "Tuning indicator tube,"[Enllaç no actiu] U.S. Patent no. 2,051,189 (filed: June 27, 1935; issued: August 18, 1936).