Granted Patent
Utility
US 5,896,938 · App. 08/757,579
Portable electrohydraulic mining drill
Inventors:
William M. Moeny, David M. Barrett
Patented Case
View Patent ↗
Granted: Apr 27, 1999
Filed: Nov 27, 1996
Inventors
William M. Moeny
David M. Barrett
Assignee (at issue)
TETRA Co., Ltd.
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.