Granted Patent
Utility
US 5,309,490 · App. 07/790,843
Remote stud cleaner
Inventor:
Bengt I. Bayersten
Patented Case
View Patent ↗
Granted: May 3, 1994
Filed: Nov 12, 1991
Inventor
Bengt I. Bayersten
Assignee (at issue)
Combustion Engineering, 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.