Granted Patent
Utility
US 5,445,708 · App. 08/210,941
Method for preparing ultrathin piezoelectric resonator plates
Inventor:
Osamu Ishii
Patented Case
View Patent ↗
Granted: Aug 29, 1995
Filed: Mar 21, 1994
Inventor
Osamu Ishii
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.