Granted Patent
Utility
US 4,517,907 · App. 06/611,240
Driven work folder
Inventor:
John M. Franke
Patented Case
View Patent ↗
Granted: May 21, 1985
Filed: May 17, 1984
Inventor
John M. Franke
Assignee (at issue)
The Singer Company Limited
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.