Granted Patent
Utility
US 5,227,247 · App. 07/732,273
Magnetic materials
Inventor:
Yakov Bogatin
Patented Case
View Patent ↗
Granted: Jul 13, 1993
Filed: Jul 18, 1991
Inventor
Yakov Bogatin
Assignee (at issue)
SPS TECHNOLOGIES, LLC
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.