Granted Patent
Utility
US 4,656,546 · App. 06/693,522
Vertical magnetic recording arrangement
Inventor:
Michael Mallory
Patented Case
View Patent ↗
Granted: Apr 7, 1987
Filed: Jan 22, 1985
Inventor
Michael Mallory
Assignee (at issue)
Digital Equipment Corporation
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.