Granted Patent
Utility
US 4,934,780 · App. 07/290,353
Constant deviation scanning apparatus
Inventor:
John McGrath
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Dec 27, 1988
Inventor
John McGrath
Assignee (at issue)
Compugraphic 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.