Granted Patent
Utility
US 4,649,236 · App. 06/812,632
Digital system connect frame
Inventors:
Paul V. De Luca, Albert Atun, Michael Shatzkin
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: Dec 23, 1985
Inventors
Paul V. De Luca
Albert Atun
Michael Shatzkin
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.