Granted Patent
Utility
US 4,248,516 · App. 06/113,091
Self-threading photographic processor
Inventor:
James D. Grooters
Patented Case
View Patent ↗
Granted: Feb 3, 1981
Filed: Jan 17, 1980
Inventor
James D. Grooters
Assignee (at issue)
Pako 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.