From Imprivata Buys HT Systems for $19M for Vein-Identifying Device:

Imprivata
Imprivata

Imprivata buys HT Systems and it’s palm scanner for $19.1 million, plus milestones. Image courtesy of Imprivata: http://www.businesswire.com/news/home/20150430006923/en/Imprivata-Acquires-HT-Systems-Expand-Authentication-Access