What Legal Action Can I Take On This Company?

It depends on the legal authorities of your state and also to what extent are they willing to take action. So you need to check it out from the corporate law firms or the local agencies ane then take action accordingly.

Get personal restraining order on the ones who attacked you and and call the police when he or she breaks the restraining order.file charges  directly on boss to whom you reported it too for not protecting you from a violent employees...make sure you have counsel on this with a lawyer and be sure you can follow through with the charges.........if you need your job ask if the other employees can be transferred or if you can be transferred to another department....hope this helps