Granted Patent
Utility
US 4,248,270 · App. 06/111,306
Reduced noise water valve provided with flow control
Inventor:
E. A. Ostrowski
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Jan 11, 1980
Inventor
E. A. Ostrowski
Assignee (at issue)
The Singer Company Limited
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.