It's the stinkin' cap...more or less.
http://www.nytimes.com/2016/08/25/busine....html?_r=0
http://www.nytimes.com/2016/08/25/busine....html?_r=0
Quote:But EpiPen is protected by patents on the device, particularly the safety cap on the needle. The patents are held by Meridian Medical Technologies, which is now part of Pfizer. One such patent, which was asserted in litigation trying to block Teva’s entry into the market, expires in 2025.