This reply is ONLY to prompt others to respond with a better answer:
Since I recall the LOTUS as being one of the first bikes to use Aero tubing ... and, that seems to have been in the very late 70s, I would guess that Shimano made the first aero seatpost.
Al Feng Albuquerque, NM
On Thu, 07 Dec 2006 10:10:47 +0000 (GMT) gholl@optonline.net writes:
> Question: when was the aero seatpost introduced and by what
> manufacturer?
> Thanks for any information.
>
> George
> (George Hollenberg MD)
> CT, USA