Granted Patent
Utility
US 4,401,225 · App. 06/381,139
Child-resistant closure unit
Inventor:
Ralph A. Schwaikert
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: May 24, 1982
Inventor
Ralph A. Schwaikert
Assignee (at issue)
RASCO GMBH
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.