Granted Patent
Utility
US 4,631,605 · App. 06/653,651
Multiple speed scanner servo system for protecting the heads and tape of helical recorders
Inventor:
David O'Gwynn
Patented Case
View Patent ↗
Granted: Dec 23, 1986
Filed: Sep 20, 1984
Inventor
David O'Gwynn
Assignee (at issue)
Ampex 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.