Granted Patent
Utility
US 5,135,491 · App. 07/608,377
Patient controlled infusion apparatus and method
Inventor:
Brian Eugene Baldwin
Patented Case
View Patent ↗
Granted: Aug 4, 1992
Filed: Nov 2, 1990
Inventor
Brian Eugene Baldwin
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.