Granted Patent
Utility
US 4,936,026 · App. 07/301,427
Charge/purge control system for air dryer
Inventors:
Kenneth L. Cramer, Robert D. Krieder
Patented Case
View Patent ↗
Granted: Jun 26, 1990
Filed: Jan 26, 1989
Inventors
Kenneth L. Cramer
Robert D. Krieder
Assignee (at issue)
AlliedSignal, 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.