Granted Patent
Utility
US 5,299,282 · App. 07/830,226
Random tone or voice message synthesizer circuit
Inventor:
Kazuhiko Tabei
Patented Case
View Patent ↗
Granted: Mar 29, 1994
Filed: Jan 31, 1992
Inventor
Kazuhiko Tabei
Assignee (at issue)
NEC 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.