Granted Patent
Utility
US 4,044,964 · App. 05/720,979
Roll holder for photographic processors
Inventor:
William B. Kellett
Patented Case
View Patent ↗
Granted: Aug 30, 1977
Filed: Sep 7, 1976
Inventor
William B. Kellett
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.