Granted Patent
Utility
US 4,771,440 · App. 06/937,374
Data modulation interface
Inventor:
Eric C. Fromm
Patented Case
View Patent ↗
Granted: Sep 13, 1988
Filed: Dec 3, 1986
Inventor
Eric C. Fromm
Assignee (at issue)
Cray Research, 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.