December - Glenn Miller is reported missing. The official explanation is that his plane went down somewhere over the English Channel, although many alternate theories have been suggested.
... by US patents 3,726,146 (1973) and 5,353,655 (1994) by L.A. Mishler and US patent 5,800,311 (1998) by P.S.Chuang.
External links
www.gyrotwister.de ...