Granted Patent
Utility
US 4,683,509 · App. 06/621,230
High efficiency magnetic erase head
Inventor:
Bruce L. Steele
Patented Case
View Patent ↗
Granted: Jul 28, 1987
Filed: Jun 15, 1984
Inventor
Bruce L. Steele
Assignee (at issue)
Odetics, 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.