Granted Patent
Utility
US 4,809,127 · App. 07/085,082
Self-regulating air ionizing apparatus
Inventors:
Arnold J. Steinman, Michael G. Yost, Donald A. Gehlke
Patented Case
View Patent ↗
Granted: Feb 28, 1989
Filed: Aug 11, 1987
Inventors
Arnold J. Steinman
Michael G. Yost
Donald A. Gehlke
Assignee (at issue)
Ion Systems, 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.