Granted Patent
Utility
US 4,899,697 · App. 07/183,199
Pressure pulse cleaning apparatus
Inventors:
Richard D. Franklin, Gregg D. Auld, David E. Murray
Patented Case
View Patent ↗
Granted: Feb 13, 1990
Filed: Apr 19, 1988
Inventors
Richard D. Franklin
Gregg D. Auld
David E. Murray
Assignee (at issue)
Westinghouse Electric Company LLC
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.