Granted Patent
Utility
US 6,143,090 · App. 09/125,238
Method and device for de-icing an intake aperture
Inventor:
Dieter Lietz
Patented Case
View Patent ↗
Granted: Nov 7, 2000
Filed: Aug 13, 1998
Inventor
Dieter Lietz
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.