Granted Patent
Utility
US 4,885,839 · App. 07/023,991
Process of fabricating a waveguide
Inventor:
Oded Ben-Dov
Patented Case
View Patent ↗
Granted: Dec 12, 1989
Filed: Mar 10, 1987
Inventor
Oded Ben-Dov
Assignee (at issue)
Federal Signal Corporation
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.