Granted Patent
Utility
US 5,008,580 · App. 07/305,919
Piezoelectric vibration generator and vibratory parts feeder incorporating the same
Inventors:
Takeshi Masuda, Susumu Yagi, Sakiichi Okabe, Yoichi Kamishima, Kazuo Kawagoe
Patented Case
View Patent ↗
Granted: Apr 16, 1991
Filed: Feb 3, 1989
Inventors
Takeshi Masuda
Susumu Yagi
Sakiichi Okabe
Yoichi Kamishima
Kazuo Kawagoe
Assignee (at issue)
Yoshida Kogyo K.K.
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.