Granted Patent
Utility
US 4,449,156 · App. 06/422,828
Telephone central office gas tube replacement protector
Inventor:
Loren A. Singer, Jr.
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Sep 24, 1982
Inventor
Loren A. Singer, Jr.
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.