Granted Patent
Utility
US 4,683,380 · App. 06/795,563
Apparatus and method for detecting a perforation on a web
Inventors:
James P. Shipkowski, Phillip W. Pearce
Patented Case
View Patent ↗
Granted: Jul 28, 1987
Filed: Nov 6, 1985
Inventors
James P. Shipkowski
Phillip W. Pearce
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.