Granted Patent
Utility
US 6,448,689 · App. 09/827,809
Piezoelectric oscillator
Inventor:
Tomio Satoh
Patented Case
View Patent ↗
Granted: Sep 10, 2002
Filed: Apr 6, 2001
Inventor
Tomio Satoh
Assignee (at issue)
Toyo Communication Equipment Co., Ltd.
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.