Granted Patent
Utility
US 6,109,620 · App. 09/125,629
Shank adapter
Inventors:
Nigel Roberts, John F. O'Brien, Joseph C. Dillon
Patented Case
View Patent ↗
Granted: Aug 29, 2000
Filed: Nov 16, 1998
Inventors
Nigel Roberts
John F. O'Brien
Joseph C. Dillon
Assignee (at issue)
Boart Longyear 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.