Granted Patent
Utility
US 5,226,446 · App. 07/720,353
Flow noise reduction
Inventor:
Robert J. Cooper
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Jun 25, 1991
Inventor
Robert J. Cooper
Assignee (at issue)
Eaton Corporation
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.