Granted Patent
Utility
US 4,542,434 · App. 06/581,421
Method and apparatus for sequenced bipolar air ionization
Inventors:
Scott Gehlke, Michael G. Yost, Arnold J. Steinman
Patented Case
View Patent ↗
Granted: Sep 17, 1985
Filed: Feb 17, 1984
Inventors
Scott Gehlke
Michael G. Yost
Arnold J. Steinman
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.