Tesla supposedly created one all the way back in the 20's or 30's. He also described modern cell phones nearly 100% accurately back in 1926:
"When wireless is perfectly applied the whole Earth will be converted into a huge brain. Which in fact it is, all things being particles of a real and rhythmic whole. We shall be able to communicate with each other instantly, irrespective of distance. Not only this, but through television and telephony we shall be able to see and hear each other as perfectly as though we were face to face, despite intervening distances of thousands of miles, and the instruments for which we will be able to do all of this will fit in our vest pockets."
Tesla supposedly created one all the way back in the 20's or 30's. He also described modern cell phones nearly 100% accurately back in 1926:
"When wireless is perfectly applied the whole Earth will be converted into a huge brain. Which in fact it is, all things being particles of a real and rhythmic whole. We shall be able to communicate with each other instantly, irrespective of distance. Not only this, but through television and telephony we shall be able to see and hear each other as perfectly as though we were face to face, despite intervening distances of thousands of miles, and the instruments for which we will be able to do all of this will fit in our vest pockets."
https://www.youtube.com/watch?v=Sj8BAVKZHM0
So, if that guy had a laser death gun invented in the 30's, I am pretty sure they have it now.
Point taken