Granted Patent
Utility
US 5,064,537 · App. 07/450,873
Seamless screen cylinder with laser cut openings
Inventors:
David E. Chupka, Joseph P. Constiner, Christopher M. Vitori
Patented Case
View Patent ↗
Granted: Nov 12, 1991
Filed: Dec 14, 1989
Inventors
David E. Chupka
Joseph P. Constiner
Christopher M. Vitori
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.