Granted Patent
Utility
US 5,012,223 · App. 07/483,700
Sound activated device and method
Inventors:
Charles A. Griebell, Christie Petrides
Patented Case
View Patent ↗
Granted: Apr 30, 1991
Filed: Feb 23, 1990
Inventors
Charles A. Griebell
Christie Petrides
Assignee (at issue)
BLACK & DECKER INC.
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.