Sikorsky Cypher; Although the Wikipedia article on this UAV claims it was developed in the late 80's, It was a classified project in the 70's. I know this because I personally put many of the used and damaged blueprints in the "burn barrel" with other top secret documents in 1974.
I am not sure why this was classified as it was devloped at a university in the 60's and quite well known at the time.
Now, here is my question: What was the university and professor that invented it ? for the life of me I can't remember. I think it was at Stanford but I can't find any info on it anymore. There was a video clip of it in an old documentary but I can't remember it either. Getting too old I guess.