Granted Patent
Utility
US 6,675,915 · App. 09/963,011
Drilling machine having a rotary head guide
Inventor:
Donald W. Smith
Patented Case
View Patent ↗
Granted: Jan 13, 2004
Filed: Sep 25, 2001
Inventor
Donald W. Smith
Assignee (at issue)
Ingersoll-Rand 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.