Granted Patent
Utility
US 5,973,252 · App. 09/172,978
Pitch detection and intonation correction apparatus and method
Inventor:
Harold A. Hildebrand
Patented Case
View Patent ↗
Granted: Oct 26, 1999
Filed: Oct 14, 1998
Inventor
Harold A. Hildebrand
Assignee (at issue)
Auburn Audio Technologies, 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.