Brandan - check out Oregon statute 30.882 on line and work to get a similar statute passed in your state.
I worked on this a few years ago and testified (with others) in a state Senate committee hearing. At the time, I was a NASO member and they were pushing this type of legislation.
It's a "sports officials protection act" and here in Oregon, if that coach would have initiated physical contact with you or your partner, he would be prosecuted. It's a Class A misdemeanor here which means every county prosecutor is obligated to actually prosecute.
I hope this jerk's career as a coach is over.
BTW - it's idiots like this that have prompted me to bring my cousin Tony to my games. I never have problems like this anymore.
