Granted Patent
Utility
US 5,487,313 · App. 08/158,978
Fluid-lock fixed-volume injector
Inventor:
Paul H. Johnson
Patented Case
View Patent ↗
Granted: Jan 30, 1996
Filed: Nov 30, 1993
Inventor
Paul H. Johnson
Assignee (at issue)
Microsensor Technology
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.