Granted Patent
Utility
US 4,805,653 · App. 06/773,642
Mobile articulatable tube bundle cleaner
Inventors:
Richard W. Krajicek, Robert R. Cradeur
Patented Case
View Patent ↗
Granted: Feb 21, 1989
Filed: Sep 9, 1985
Inventors
Richard W. Krajicek
Robert R. Cradeur
Assignee (at issue)
Servi-Tech, 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.