Granted Patent
Utility
US 4,588,980 · App. 06/653,423
Residue to analog converter
Inventor:
Peter S. Bernardson
Patented Case
View Patent ↗
Granted: May 13, 1986
Filed: Sep 24, 1984
Inventor
Peter S. Bernardson
Assignee (at issue)
GTE Communication Systems 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.