Granted Patent
Utility
US 5,527,439 · App. 08/376,859
Cylindrical magnetron shield structure
Inventors:
Peter A. Sieck, James G. Rietzel, Norman E. Allen
Patented Case
View Patent ↗
Granted: Jun 18, 1996
Filed: Jan 23, 1995
Inventors
Peter A. Sieck
James G. Rietzel
Norman E. Allen
Assignee (at issue)
The BOC Group Limited
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.