Granted Patent
Utility
US 5,855,322 · App. 08/927,221
System and method for one-way spray aerosol tip
Inventor:
Daniel Py
Patented Case
View Patent ↗
Granted: Jan 5, 1999
Filed: Sep 10, 1997
Inventor
Daniel Py
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.