Granted Patent
Utility
US 6,469,598 · App. 09/803,771
SAW filter with unidirectional transducer and communication apparatus using the same
Inventors:
Shigeru Tsuzuki, Tsutomu Igaki, Kazunori Nishimura, Ken Matsunami
Patented Case
View Patent ↗
Granted: Oct 22, 2002
Filed: Mar 12, 2001
Inventors
Shigeru Tsuzuki
Tsutomu Igaki
Kazunori Nishimura
Ken Matsunami
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.