Granted Patent
Utility
US 6,446,738 · App. 09/252,761
Blasthole drill including an improved operator's cab
Inventor:
James W. Boyd
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Feb 19, 1999
Inventor
James W. Boyd
Assignee (at issue)
Harnischfeger Technologies, 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.