Granted Patent
Utility
US 4,755,839 · App. 07/063,497
Pivotally mounted spread roller assembly
Inventor:
John F. Pasieka
Patented Case
View Patent ↗
Granted: Jul 5, 1988
Filed: Jun 18, 1987
Inventor
John F. Pasieka
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.