Historical clue formulations

• Projecting edge — 2022-09-11
• Projecting rim of a metal beam — 2020-12-22
• Pipe attachment — 2009-11-29
• Projecting rim on a pipe — 2004-10-18
• Projecting part — 2001-05-02
• Golf club feature — 1995-02-24
• I-beam projection — 1995-02-05