In what year did Hiram Percy Maxim found Maxim Silencers, Inc., which handled both firearm and engine silencers?

Answer

1912

Maxim founded his company, Maxim Silencers, Inc., in 1912 to focus on both firearm accessories and engine exhaust silencers.

In what year did Hiram Percy Maxim found Maxim Silencers, Inc., which handled both firearm and engine silencers?
inventionCarEngineertransportsilencer