Granted Patent
Utility
US 4,575,169 · App. 06/698,922
Telephone building entrance terminal
Inventors:
Raymond Duplatre, Paul V. De Luca
Patented Case
View Patent ↗
Granted: Mar 11, 1986
Filed: Feb 6, 1985
Inventors
Raymond Duplatre
Paul V. De Luca
Assignee (at issue)
Porta Systems 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.