Granted Patent
Utility
US 4,325,497 · App. 06/127,594
Child-resistant spray through cover
Inventor:
Ronald F. Ewald
Patented Case
View Patent ↗
Granted: Apr 20, 1982
Filed: Mar 6, 1980
Inventor
Ronald F. Ewald
Assignee (at issue)
Knight Engineering & Molding Co.
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.