Centuries: 9th century - 10th century - 11th century
Decades: 920s 930s 940s 950s 960s - 970s - 980s 990s 1000s 1010s 1020s
Years: 966 967 968 969 970 - 971 - 972 973 974 975 976
Births
Deaths
... covered 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 ...