Granted Patent
Utility
US 6,040,654 · App. 09/131,888
Piezoelectric transformer
Inventor:
Ronan Le Letty
Patented Case
View Patent ↗
Granted: Mar 21, 2000
Filed: Aug 10, 1998
Inventor
Ronan Le Letty
Assignee (at issue)
Eta SA Fabriques d'Ebauches
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.