Granted Patent
Utility
US 4,474,205 · App. 06/591,587
Sliding blade apparatus for closing conduits
Inventors:
Paul L. Dreyer, William R. McLennan, Kenneth I. Conley
Patented Case
View Patent ↗
Granted: Oct 2, 1984
Filed: Mar 20, 1984
Inventors
Paul L. Dreyer
William R. McLennan
Kenneth I. Conley
Assignee (at issue)
Ecolaire Incorporated
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.