Granted Patent
Utility
US 5,082,331 · App. 07/502,030
Continuous miner with duct assembly
Inventors:
Maurice K. LeBegue, Henry E. Wilson
Patented Case
View Patent ↗
Granted: Jan 21, 1992
Filed: Mar 29, 1990
Inventors
Maurice K. LeBegue
Henry E. Wilson
Assignee (at issue)
Tamrock World Corporation, N.V.
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.