Granted Patent
Utility
US 4,851,880 · App. 07/211,021
Cleaning apparatus having airfoils
Inventors:
Francisco L. Ziegelmuller, Carl R. Bothner
Patented Case
View Patent ↗
Granted: Jul 25, 1989
Filed: Jun 24, 1988
Inventors
Francisco L. Ziegelmuller
Carl R. Bothner
Assignee (at issue)
EASTMAN KODAK COMPANY
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.