Granted Patent
Utility
US 4,233,679 · App. 06/079,756
Adjustable piezoelectric transducer for a watch
Inventor:
Jack Schwarzschild
Patented Case
View Patent ↗
Granted: Nov 11, 1980
Filed: Sep 28, 1979
Inventor
Jack Schwarzschild
Assignee (at issue)
Timex 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.