Wilhelm Schickard

Wilhelm Schickard was a German professor of Hebrew and astronomy who became famous in the second part of the 20th century after Franz Hammer, a biographer of Johannes Kepler, claimed that the drawings of a calculating clock, predating the public release of Pascal's calculator by twenty years, had been discovered in two unknown letters written by Schickard to Johannes Kepler in 1623 and 1624.

22 April 1592

Born on the same birth day (22 April): Bhama Srinivasan • Dan Cloutier • Jason Miller (playwright) • John Buchanan (Canadian politician) • Kaká • Kathleen Ferrier • Lewis Powell (conspirator) • Mary Prior • Michael Wittmann • Mickey Morandini • Pierre Hétu • Richard Diebenkorn • Robert Bárány • Solomon Caesar Malan • Vladimir Lenin • Vladimir Nabokov • Wu Peifu • Zoltán Gera

Born in the same month (April 1592): Francesco Maria Brancaccio • John Eliot (statesman)