Granted Patent
Utility
US 5,157,365 · App. 07/654,719
Combined block-substrate filter
Inventor:
Truc Hoang
Patented Case
View Patent ↗
Granted: Oct 20, 1992
Filed: Feb 13, 1991
Inventor
Truc Hoang
Assignee (at issue)
Motorola, Inc.
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.