Hisdates•ComImportant Inventions In The Year 1921
Saturday, 30 September 2023
Karel Capek and his brother coin the word "robot" in a play about artificial humans.
John Larson develops the polygraph ("lie detector") machine.
0307 Apr27 0919 0476 Aug28 1836
1135 1941 0660 Jan05 1084
Jul14 1690 Oct23 Oct25 1283
1168 Apr20 Sep18 1139 0871
0961 Apr15 Jan23 0648 Aug14
Mar21 1218 Aug08 Dec21 Aug24