Granted Patent
Utility
US 5,019,052 · App. 07/439,333
Bipartite injector device
Inventor:
John Rohrbough
Patented Case
View Patent ↗
Granted: May 28, 1991
Filed: Nov 20, 1989
Inventor
John Rohrbough
Assignee (at issue)
David Bull Laboratories Pty. Ltd.
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.