Granted Patent
Utility
US 4,665,820 · App. 06/834,770
Print band timing mark detector
Inventor:
Walter C. Chapman
Patented Case
View Patent ↗
Granted: May 19, 1987
Filed: Feb 28, 1986
Inventor
Walter C. Chapman
Assignee (at issue)
Centronics Data Computer 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.