Granted Patent
Utility
US 4,655,507 · App. 06/612,215
Continuous miner
Inventor:
Edward Wechner
Patented Case
View Patent ↗
Granted: Apr 7, 1987
Filed: May 21, 1984
Inventor
Edward Wechner
Assignee (at issue)
Joy Manufacturing 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.