Granted Patent
Utility
US 4,422,115 · App. 06/283,163
Lightweight dual head support assembly for magnetic disk drives
Inventor:
John L. Spash
Patented Case
View Patent ↗
Granted: Dec 20, 1983
Filed: Jul 14, 1981
Inventor
John L. Spash
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.