Granted Patent
Utility
US 5,528,686 · App. 08/272,501
Transformerless hybrid circuit having direct powered line-side amplifiers
Inventors:
Donald Thomas Cwynar, Donald R. Laturell
Patented Case
View Patent ↗
Granted: Jun 18, 1996
Filed: Jul 8, 1994
Inventors
Donald Thomas Cwynar
Donald R. Laturell
Assignee (at issue)
AT&T CORP.
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.