Granted Patent
Utility
US 4,494,821 · App. 06/472,733
Laser printing system with developable helicoid reflector
Inventors:
John R. Lewis, Andrew McCurdy, Arthur D. Gaudet
Patented Case
View Patent ↗
Granted: Jan 22, 1985
Filed: Mar 7, 1983
Inventors
John R. Lewis
Andrew McCurdy
Arthur D. Gaudet
Assignee (at issue)
Polaroid Corporation
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.