Granted Patent
Utility
US 5,750,878 · App. 08/597,052
Removable reference plate
Inventor:
Brian Joseph Bliss
Patented Case
View Patent ↗
Granted: May 12, 1998
Filed: Feb 5, 1996
Inventor
Brian Joseph Bliss
Assignee (at issue)
Harbison-Walker Refractories 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.