Granted Patent
Utility
US 5,784,974 · App. 08/837,842
System for improving fuel feed control of volumetric coal feeders
Inventor:
Kenneth J. Krauss
Patented Case
View Patent ↗
Granted: Jul 28, 1998
Filed: Apr 22, 1997
Inventor
Kenneth J. Krauss
Assignee (at issue)
Federal Signal Corporation
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.