Granted Patent
Utility
US 4,904,922 · App. 07/225,055
Apparatus for converting between digital and analog values
Inventor:
Joseph H. Colles
Patented Case
View Patent ↗
Granted: Feb 27, 1990
Filed: Jul 26, 1988
Inventor
Joseph H. Colles
Assignee (at issue)
Brooktree 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.