Granted Patent
Utility
US 6,556,922 · App. 09/862,822
Non-stationary filter design and application for seismic signals
Inventor:
Phil D. Anno
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: May 22, 2001
Inventor
Phil D. Anno
Assignee (at issue)
Conoco 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.