- of
Richtantenne Ismaning, Mast
Nordost - Skys****erPage.com". "Drawings of
Richtantenne Ismaning, Mast
Sudwest - Skys****erPage.com". "
Richtantenne Ismaning...
- aerials",
issued 1957 CH
patent 384644,
Rudolf Baumgartner, "Vollgespeiste
Richtantenne für Kurz- und Ultrakurzwellen",
issued 1960 Blattenberger, Kirt (ZS6PP)...