Granted Patent
Utility
US 5,660,329 · App. 08/612,856
Vehicle heater with water pump venting
Inventor:
Michael Humburg
Patented Case
View Patent ↗
Granted: Aug 26, 1997
Filed: Feb 26, 1996
Inventor
Michael Humburg
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.