Granted Patent
Utility
US 4,471,917 · App. 06/399,945
Balloon-control guide and yarn rewinding process
Inventor:
John K. Whisnant
Patented Case
View Patent ↗
Granted: Sep 18, 1984
Filed: Jul 20, 1982
Inventor
John K. Whisnant
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.