Granted Patent
Utility
US 6,831,289 · App. 10/130,382
Detector for scattered light
Inventors:
Kai-Uwe Preikszas, Andreas Siemens
Patented Case
View Patent ↗
Granted: Dec 14, 2004
Filed: Aug 26, 2002
Inventors
Kai-Uwe Preikszas
Andreas Siemens
Assignee (at issue)
Wagner Alarm Sicherungssysteme 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.