Granted Patent
Utility
US 6,021,752 · App. 09/043,079
Vehicle heater independent of the engine
Inventors:
Guido Wahle, Heinrich Wacker
Patented Case
View Patent ↗
Granted: Feb 8, 2000
Filed: Mar 6, 1998
Inventors
Guido Wahle
Heinrich Wacker
Assignee (at issue)
J. Eberspaecher GmbH & Co. KG
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.