who invented the silencer
Silencers were invented by Hiram Percy Maxim. His father invented the first working modern machine gun. H.P. Maxim received his first patent in late March 1909. H.P. Maxim. Inventor of the Silencer. In 1934, congress passed the National Firearms Act which included silencers. This added a prohibitively expensive $200 transfer tax and registration scheme to an item that typically sold for less than $5.