Granted Patent
Utility
US 5,916,431 · App. 08/351,893
Filter cleaning
Inventors:
Andrew Derek Turner, Ronald K. Dawson
Patented Case
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Granted: Jun 29, 1999
Filed: Nov 10, 1994
Inventors
Andrew Derek Turner
Ronald K. Dawson
Assignee (at issue)
AEA Technology PLC
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.