Granted Patent
Utility
US 5,990,762 · App. 08/862,383
Surface acoustic wave filter and multistage filter with multiple inside busbar lead-out electrodes
Inventors:
Hiroyuki Nakamura, Toru Yamada, Kazunori Nishimura, Toshio Ishizaki
Patented Case
View Patent ↗
Granted: Nov 23, 1999
Filed: May 23, 1997
Inventors
Hiroyuki Nakamura
Toru Yamada
Kazunori Nishimura
Toshio Ishizaki
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.