Granted Patent
Utility
US 4,901,517 · App. 07/380,944
Apparatus for the drafting section of ring spinning frames
Inventor:
Don E. Fisher
Patented Case
View Patent ↗
Granted: Feb 20, 1990
Filed: Jul 17, 1989
Inventor
Don E. Fisher
Assignee (at issue)
Monsanto Company
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.