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- Special feature: The story of the TN-patent (translation from German to English, authorized by the author, Gerhard H. Buntz)
Original article: Gerhard H. Buntz (Patent Attorney, European Patent Attorney, Physicist, Basel)
"Twisted Nematic Liquid Crystal Displays (TN-LCDs), an invention from Basel with global effects",
Information No. 118, October 2005, issued by Internationale Treuhand AG, Basel, Genf, Zurich.
- Patent CH 532 261, Inventors Wolfgang Helfrich, Martin Schadt, filed December 4, 1970
- Patent US 373 1986, Inventor James L. Fergason, filed April 22, 1971
- Complete list of publications of Martin Schadt
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