Granted Patent
Utility
US 6,741,363 · App. 09/453,515
Method and an apparatus for the optical detection of a contrast line
Inventor:
Bertram Kaupert
Patented Case
View Patent ↗
Granted: May 25, 2004
Filed: Dec 1, 1999
Inventor
Bertram Kaupert
Assignee (at issue)
STEINBICHLER OPTOTECHNIK 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.