Hiram Percy Maxim is usually credited with inventing and selling the first commercially successful firearm silencer around 1902, receiving a patent for it on March 30, 1909. Maxim gave his device the trademarked name "Maxim Silencer", and they were regularly advertised in sporting goods magazines. The muffler for internal combustion engines was developed in parallel with the firearm silencer by Maxim in the early 20th century, using many of the same techniques to provide quieter-running engines, and in many English-speaking countries automobile mufflers are called silencers.