Granted Patent
Utility
US 5,668,590 · App. 08/253,553
Optical beam scanning system with rotating beam compensation
Inventors:
Seiji Maruo, Akira Arimoto, Yoshihito Maeda, Tatsuya Sugita
Patented Case
View Patent ↗
Granted: Sep 16, 1997
Filed: Jun 3, 1994
Inventors
Seiji Maruo
Akira Arimoto
Yoshihito Maeda
Tatsuya Sugita
Assignees (at issue)
HITACHI, LTD.
Hitachi Koki 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.