Granted Patent
Utility
US 5,785,870 · App. 08/745,398
Variable flow filter unit
Inventors:
Scott J. Davis, Kenneth Thomas Bennick, Michael E. Isch
Patented Case
View Patent ↗
Granted: Jul 28, 1998
Filed: Nov 8, 1996
Inventors
Scott J. Davis
Kenneth Thomas Bennick
Michael E. Isch
Assignee (at issue)
Delaware Capital Formation, 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.