Granted Patent
Utility
US 4,639,072 · App. 06/676,591
Optical beam scanning apparatus including a cylindrical lens having its opposite ends closer to the scanned plane than its medial portion
Inventors:
Toyotsugu Itoh, Toshio Muramatsu
Patented Case
View Patent ↗
Granted: Jan 27, 1987
Filed: Nov 29, 1984
Inventors
Toyotsugu Itoh
Toshio Muramatsu
Assignee (at issue)
Konishiroku Photo Industry 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.