Granted Patent
Utility
US 5,952,623 · App. 08/999,588
Pneumatic hand tool exhaust muffler
Inventor:
Robert E. Sterling
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Jan 13, 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.