Granted Patent
Utility
US 5,131,033 · App. 07/524,296
Sealing current generator for a telephone circuit
Inventor:
Peter M. Reum
Patented Case
View Patent ↗
Granted: Jul 14, 1992
Filed: May 15, 1990
Inventor
Peter M. Reum
Assignee (at issue)
XEL Communications, Inc.
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.