Granted Patent
Utility
US 5,794,723 · App. 08/567,184
Drilling rig
Inventors:
Clifford Caneer, Jr., William V. Dycus
Patented Case
View Patent ↗
Granted: Aug 18, 1998
Filed: Dec 12, 1995
Inventors
Clifford Caneer, Jr.
William V. Dycus
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.