Granted Patent
Utility
US 5,727,074 · App. 08/621,534
Method and apparatus for digital filtering of audio signals
Inventor:
Harold A. Hildebrand
Patented Case
View Patent ↗
Granted: Mar 10, 1998
Filed: Mar 25, 1996
Inventor
Harold A. Hildebrand
Assignee (at issue)
Harold A. Hildebrand
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.