Granted Patent
Utility
US 5,881,722 · App. 08/533,665
Portable drag compressor powered mechanical ventilator
Inventors:
Douglas F. DeVries, Michael J. Cegielski, Warner V. Graves, Jr., Malcolm Williams, Michael Holmes
Patented Case
View Patent ↗
Granted: Mar 16, 1999
Filed: Sep 25, 1995
Inventors
Douglas F. DeVries
Michael J. Cegielski
Warner V. Graves, Jr.
Malcolm Williams
Michael Holmes
Assignee (at issue)
Bird Products Corporation
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.