Granted Patent
Utility
US 6,552,630 · App. 09/997,700
Bi-directional low-pass filter for use at user end or office end in communication network
Inventors:
Her-Jun Chueh, Kuang-Che Chen
Patented Case
View Patent ↗
Granted: Apr 22, 2003
Filed: Nov 29, 2001
Inventors
Her-Jun Chueh
Kuang-Che Chen
Assignee (at issue)
Primax Electronics 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.