http://patft.uspto.gov/netacgi/nph-...50&s1=8981261.PN.&OS=PN/8981261&RS=PN/8981261 This... is pretty interesting sounding. I'd be curious to see it in action Please Register or Log in to view the hidden image!
Sounds like it would require a ton of energy to create it and then you'd have to be at the right place whenever the shockwave hits and to know where it comes from. If you send the signal out to where you think it may come from there could be another coming from your back. Interesting but not practical on the open battlefield.