Granted Patent
Utility
US 5,222,828 · App. 07/785,126
Device for cleaning and lubricating the exterior surface of asphalt compacting drums
Inventor:
Edward Magalski
Patented Case
View Patent ↗
Granted: Jun 29, 1993
Filed: Oct 30, 1991
Inventor
Edward Magalski
Assignee (at issue)
Ingersoll-Rand Company
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.