In February, 2013,
Medtronic notified "Health Care Professionals". (letter attached)
Medtronic told the FDA at about the same time.

April is Parkinson's Awareness Month; AbbVie and Medronics were both sponsors, and had information kiosks at the Unity Walk; but the topic did not come up.

On May 2, Businessweek and Wall Street Journal informed investors(Attached in posts above, by LindaL.) Shares in AbbVie reach new high.

On May 3, LindyLanka told PeopleWithParkinson's. The last to know.

Technical specs:
The letter to the health care professionals, in Feb. 2013:

http://professional.medtronic.com/wc...p-advisory.pdf