Granted Patent
Utility
US 4,148,080 · App. 05/820,868
Di-bit recording technique and associated system
Inventors:
Herbert U. Ragle, Norman S. Blessum
Patented Case
View Patent ↗
Granted: Apr 3, 1979
Filed: Aug 1, 1977
Inventors
Herbert U. Ragle
Norman S. Blessum
Assignee (at issue)
Burroughs, 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.