Granted Patent
Utility
US 6,759,924 · App. 10/049,257
Multi-frequency antenna duplexer
Inventors:
Toru Sakuragawa, Yuki Satoh, Kozo Murakami, Ryoichi Takayama
Patented Case
View Patent ↗
Granted: Jul 6, 2004
Filed: Jun 14, 2002
Inventors
Toru Sakuragawa
Yuki Satoh
Kozo Murakami
Ryoichi 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.