Granted Patent
Utility
US 6,011,652 · App. 08/996,513
Multilayer thin film dielectric bandpass filter
Inventor:
David Henry Cushing
Patented Case
View Patent ↗
Granted: Jan 4, 2000
Filed: Dec 23, 1997
Inventor
David Henry Cushing
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.