Granted Patent
Utility
US 4,433,208 · App. 06/296,678
Pressurizable telephone load coil assembly
Inventor:
David C. Noetzelmann, Sr.
Patented Case
View Patent ↗
Granted: Feb 21, 1984
Filed: Aug 27, 1981
Inventor
David C. Noetzelmann, Sr.
Assignee (at issue)
Midwec Toroid & Capacitor 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.