Granted Patent
Utility
US 4,857,745 · App. 07/187,195
Method and apparatus for monitoring the passage of marks on a web
Inventor:
Martin J. Gough
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Apr 28, 1988
Inventor
Martin J. Gough
Assignee (at issue)
Crosfield Electronics Limited
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.