Granted Patent
Utility
US 5,454,938 · App. 08/238,393
Bed height sensing device for biological reactor
Inventors:
Michael L. Doyle, Peter J. Petit, Eugene E. Mazewski
Patented Case
View Patent ↗
Granted: Oct 3, 1995
Filed: May 5, 1994
Inventors
Michael L. Doyle
Peter J. Petit
Eugene E. Mazewski
Assignee (at issue)
Envirex, 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.