Granted Patent
Utility
US 6,540,150 · App. 09/582,437
Fuel-operated air heater
Inventors:
Gunter Eberspach, Walter Blaschke
Patented Case
View Patent ↗
Granted: Apr 1, 2003
Filed: Jun 23, 2000
Inventors
Gunter Eberspach
Walter Blaschke
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.