Granted Patent
Utility
US 6,806,619 · App. 10/271,269
Interdigital transducer, surface acoustic wave filter, and radio communication apparatus
Inventors:
Hiroyuki Nakamura, Ken Matsunami, Kazunori Nishimura
Patented Case
View Patent ↗
Granted: Oct 19, 2004
Filed: Oct 15, 2002
Inventors
Hiroyuki Nakamura
Ken Matsunami
Kazunori Nishimura
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.