Granted Patent
Utility
US 4,858,229 · App. 06/896,559
Filter interconnection matrix
Inventors:
Harold A. Rosen, James D. Thompson
Patented Case
View Patent ↗
Granted: Aug 15, 1989
Filed: Aug 14, 1986
Inventors
Harold A. Rosen
James D. Thompson
Assignee (at issue)
Hughes Aircraft Company
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.