Granted Patent
Utility
US 6,536,694 · App. 09/755,431
Gyratory crusher spider guards
Inventor:
Albert Van Mullem
Patented Case
View Patent ↗
Granted: Mar 25, 2003
Filed: Jan 5, 2001
Inventor
Albert Van Mullem
Assignee (at issue)
SANDVIK AB
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.