Granted Patent
Utility
US 4,748,530 · App. 06/851,590
Disk cover collar
Inventor:
James L. Barnes
Patented Case
View Patent ↗
Granted: May 31, 1988
Filed: Apr 14, 1986
Inventor
James L. Barnes
Assignee (at issue)
Magnetic Peripherals, 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.