Granted Patent
Utility
US 6,031,435 · App. 09/239,961
Multiple-stage ladder type SAW filter having series resonators with decreasing electrode pitches
Inventors:
Naoto Inose, Hok Huor Ou
Patented Case
View Patent ↗
Granted: Feb 29, 2000
Filed: Jan 29, 1999
Inventors
Naoto Inose
Hok Huor Ou
Assignee (at issue)
OKI ELECTRIC INDUSTRY CO., LTD.
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.