Granted Patent
Utility
US 4,821,114 · App. 07/044,609
Opto-electronic scanning arrangement
Inventor:
Axel Gebhardt
Patented Case
View Patent ↗
Granted: Apr 11, 1989
Filed: May 1, 1987
Inventor
Axel Gebhardt
Assignee (at issue)
Dr. Ing. Rudolf Hell GmbH
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.