Granted Patent
Utility
US 4,815,023 · App. 07/045,986
Quadrature mirror filters with staggered-phase subsampling
Inventor:
James H. Arbeiter
Patented Case
View Patent ↗
Granted: Mar 21, 1989
Filed: May 4, 1987
Inventor
James H. Arbeiter
Assignee (at issue)
General Electric Company
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.