Granted Patent
Utility
US 4,788,710 · App. 07/061,500
Telephone line selection and isolation method and apparatus
Inventor:
Daniel Lynch
Patented Case
View Patent ↗
Granted: Nov 29, 1988
Filed: Jun 11, 1987
Inventor
Daniel Lynch
Assignee (at issue)
Keptel, 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.