Granted Patent
Utility
US 5,808,774 · App. 08/715,547
Method of correcting curvature of image surface and optical beam scanning apparatus for use with the same
Inventor:
Motonobu Kawabata
Patented Case
View Patent ↗
Granted: Sep 15, 1998
Filed: Sep 19, 1996
Inventor
Motonobu Kawabata
Assignee (at issue)
DAINIPPON SCREEN MFG. 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.