Historical clue formulations

• He's got notions — 2022-06-21
• Creative sort — 2018-05-09
• Creative sort — 2017-11-26
• Visionary — 2012-08-30
• Inventive type — 2009-11-29
• Thinker — 2007-04-05
• Creative guy — 2002-07-29
• Creative person — 2001-07-16
• Inventor sort — 1999-09-19
• Rand Corporation employee — 1997-12-07
• Think tank member — 1995-12-31