Centuries: 2nd century - 3rd century - 4th century
Decades: 180s 190s 200s 210s 220s - 230s - 240s 250s 260s 270s 280s
Years: 226 227 228 229 230 - 231 - 232 233 234 235 236
Births
Deaths
... 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 ...