Granted Patent
Utility
US 4,929,924 · App. 07/303,516
Electronic alarm horn
Inventors:
William P. Buyak, Bruce V. Testa, Robert W. Right
Patented Case
View Patent ↗
Granted: May 29, 1990
Filed: Jan 27, 1989
Inventors
William P. Buyak
Bruce V. Testa
Robert W. Right
Assignee (at issue)
Federal Signal 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.