Granted Patent
Utility
US 4,837,818 · App. 06/852,609
Telecommunication line circuit
Inventors:
Jozef F. P. Pieters, Pierre-Paul F. M. Marie Guebels
Patented Case
View Patent ↗
Granted: Jun 6, 1989
Filed: Apr 16, 1986
Inventors
Jozef F. P. Pieters
Pierre-Paul F. M. Marie Guebels
Assignee (at issue)
Alcatel N.V.
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.