Granted Patent
Utility
US 4,915,300 · App. 07/308,480
High pressure mixing and spray nozzle apparatus and method
Inventor:
John Ryan
Patented Case
View Patent ↗
Granted: Apr 10, 1990
Filed: Feb 10, 1989
Inventor
John Ryan
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.