Granted Patent
Utility
US 4,842,576 · App. 06/919,044
System for generating substantially constant fluid pressure
Inventors:
Michael J. Lysaght, Daniel R. Boggs, Philip L. Ritger
Patented Case
View Patent ↗
Granted: Jun 27, 1989
Filed: Oct 15, 1986
Inventors
Michael J. Lysaght
Daniel R. Boggs
Philip L. Ritger
Assignee (at issue)
Baxter International 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.