Granted Patent
Utility
US 4,898,201 · App. 07/308,000
Portabl tool for cleaning valve bores and associated inlet passage
Inventors:
Jeff A. Conley, Jeffrey T. Lynch
Patented Case
View Patent ↗
Granted: Feb 6, 1990
Filed: Feb 9, 1989
Inventors
Jeff A. Conley
Jeffrey T. Lynch
Assignee (at issue)
Keystone International
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.