Here's another patch representing a weapon system that is now in the bust bin of history. It's from an "ENTAC" Anti-tank section (or platoon/company?) in the 19th Infantry Regiment. The ENTAC (ENgin Teleguide Anti-Char) was a french wire guided anti-tank missile adopted by the US Army in 1963 and discontinued by 1969 when they adopted the more advanced TOW missile system. The system was mounted on the back of M151 jeeps and acted as the primary anti-armor weapon for infantry units in Germany during the mid-1960's.
Here is a cut-away of an ENTAC missile, note the shape that is clearly depicted on the patch.
