Granted Patent
Utility
US 4,313,202 · App. 06/136,919
Modem circuitry
Inventor:
Andrew M. Kameya
Patented Case
View Patent ↗
Granted: Jan 26, 1982
Filed: Apr 3, 1980
Inventor
Andrew M. Kameya
Assignee (at issue)
Codex 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.