Granted Patent
Utility
US 4,813,530 · App. 06/847,968
Conveyor drive for miner
Inventor:
Edward Wechner
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: Apr 3, 1986
Inventor
Edward Wechner
Assignee (at issue)
Joy Technologies 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.