Granted Patent
Utility
US 6,602,026 · App. 09/600,211
Extendible drill support frame for mining apparatus and roof bolting equipment
Inventor:
Brad Neilson
Patented Case
View Patent ↗
Granted: Aug 5, 2003
Filed: Jul 12, 2000
Inventor
Brad Neilson
Assignee (at issue)
Joy MM Delaware, 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.