Granted Patent
Utility
US 6,819,835 · App. 10/404,473
Tunable filter device
Inventors:
Charles Leu, Ga-Lane Chen
Patented Case
View Patent ↗
Granted: Nov 16, 2004
Filed: Mar 31, 2003
Inventors
Charles Leu
Ga-Lane Chen
Assignee (at issue)
Hon Hai Precision Ind. Co., 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.