Granted Patent
Utility
US 6,674,345 · App. 10/196,433
Surface acoustic wave filter and communication device using the filter
Inventors:
Hiroyuki Nakamura, Kazunori Nishimura, Akio Tsunekawa
Patented Case
View Patent ↗
Granted: Jan 6, 2004
Filed: Jul 15, 2002
Inventors
Hiroyuki Nakamura
Kazunori Nishimura
Akio Tsunekawa
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.