Granted Patent
Utility
US 4,846,301 · App. 07/177,124
Silencer
Inventors:
Håkan Granath, Bror G. G. Pettersson
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Apr 4, 1988
Inventors
Håkan Granath
Bror G. G. Pettersson
Assignee (at issue)
Aktiebolaget Electrolux
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.