Granted Patent
Utility
US 4,614,840 · App. 06/663,273
Telecommunication line circuit and associated polarity reversal circuit
Inventors:
Luc A. Bienstman, Wlodimir J. Dobosch
Patented Case
View Patent ↗
Granted: Sep 30, 1986
Filed: Oct 22, 1984
Inventors
Luc A. Bienstman
Wlodimir J. Dobosch
Assignee (at issue)
International Standard Electric 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.