Granted Patent
Utility
US 6,310,422 · App. 09/423,772
Surface acoustic wave filter
Inventors:
Yuki Satoh, Toru Sakuragawa, Mitsuhiro Furukawa, Ryouichi Takayama
Patented Case
View Patent ↗
Granted: Oct 30, 2001
Filed: Feb 28, 2000
Inventors
Yuki Satoh
Toru Sakuragawa
Mitsuhiro Furukawa
Ryouichi Takayama
Assignee (at issue)
SUMITOMO ELECTRIC INDUSTRIES, 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.