Granted Patent
Utility
US 6,629,342 · App. 09/614,083
Method for producing an AT-cut resonator
Inventors:
Yoshiaki Tanaka, Mitsuhiro Nishida, Toshio Sugiyama, Hiroyuki Kobayashi
Patented Case
View Patent ↗
Granted: Oct 7, 2003
Filed: Jul 11, 2000
Inventors
Yoshiaki Tanaka
Mitsuhiro Nishida
Toshio Sugiyama
Hiroyuki Kobayashi
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.