Many years ago there weren't though, hence the reasoning I carried a roll of quarters.Brass knuckles are legal as well. They also have the added benefit of protecting your hand from shards of hepatitis and HIV infected tooth from becoming lodged in your hand.
But I do agree that "brass knuckles" are a much better option. A roll of quarters was better than just a clenched fist, and legal at that time.
Plus, back then, I almost always had rolls of quarters for the laundromat!