Granted Patent
Utility
US 6,237,847 · App. 09/305,879
System for detecting multiple superposed sheets
Inventor:
Douglas L. Milne
Patented Case
View Patent ↗
Granted: May 29, 2001
Filed: May 5, 1999
Inventor
Douglas L. Milne
Assignee (at issue)
NCR Corporation
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.