Granted Patent
Utility
US 4,489,898 · App. 06/430,561
Method and apparatus for initiating the winding of filamentary material upon a winder tube
Inventor:
Max L. Cardell
Patented Case
View Patent ↗
Granted: Dec 25, 1984
Filed: Sep 30, 1982
Inventor
Max L. Cardell
Assignee (at issue)
Celanese GmbH
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.