Pointing to the fact that someone has a working model, so if they made one then more to come.... The patent from a hundred years ago is irrevelant... that gentleman is long gone.
guess how long they have had working models
from 1999
However, silk is widely produced in Thailand and researchers at the Rajamangala Institute of Technology have already made and tested a number of vests.
The vests have been proven to give protection from shots fired from a .22 calibre handgun, high-velocity rifle shots as well as the .38 special round-nose lead bullet which is classified as threat level one by the US National Institute of Justice.