Granted Patent
Utility
US 6,280,073 · App. 09/594,580
Rotary elevator for feeding aggregate from a drum dryer to a mixing drum
Inventor:
Bruce A. Dillman
Patented Case
View Patent ↗
Granted: Aug 28, 2001
Filed: Jun 9, 2000
Inventor
Bruce A. Dillman
Assignee (at issue)
Dillman Equipment, Inc.
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.