Granted Patent
Utility
US 4,875,977 · App. 07/144,842
Horizontal twin wire machine with vertically adjustable open roll and deflector blade
Inventors:
Richard W. Creagan, Alan J. Nicol
Patented Case
View Patent ↗
Granted: Oct 24, 1989
Filed: Jan 15, 1988
Inventors
Richard W. Creagan
Alan J. Nicol
Assignee (at issue)
Black Clawson Company, 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.