Granted Patent
Utility
US 4,463,403 · App. 06/424,209
Plug type gas tube replacement module
Inventor:
Michael Fasano
Patented Case
View Patent ↗
Granted: Jul 31, 1984
Filed: Sep 27, 1982
Inventor
Michael Fasano
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.