Granted Patent
Utility
US 5,909,016 · App. 09/082,293
Pneumatic hand tool exhaust muffler
Inventor:
Robert E. Sterling
Patented Case
View Patent ↗
Granted: Jun 1, 1999
Filed: May 19, 1998
Inventor
Robert E. Sterling
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.