Historical clue formulations

• Waiters at busy restaurants might be handed them — 2022-03-09
• Forerunners of cellphones — 2019-09-18
• Obsolescent communications devices — 2017-03-22
• Cells displaced them — 2014-08-24
• Obsolescent communication devices — 2011-07-21
• They may interrupt meetings — 2009-09-25
• Motorola products — 2009-03-01
• Items on belts — 2000-12-13
• Items on belts — 1999-07-24
• They let you know you're wanted — 1998-07-12
• Communication devices — 1994-02-12