Granted Patent
Utility
US 4,448,516 · App. 06/397,681
Developer roll
Inventors:
Jonathon S. Arney, Richard F. Wright
Patented Case
View Patent ↗
Granted: May 15, 1984
Filed: Jul 13, 1982
Inventors
Jonathon S. Arney
Richard F. Wright
Assignee (at issue)
The Mead 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.