Granted Patent
Utility
US 4,995,864 · App. 07/394,076
Dual chamber pumping apparatus
Inventors:
Victor L. Bartholomew, Giorgio di Palma
Patented Case
View Patent ↗
Granted: Feb 26, 1991
Filed: Aug 15, 1989
Inventors
Victor L. Bartholomew
Giorgio di Palma
Assignee (at issue)
Imed Inc
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.