Granted Patent
Utility
US 5,706,642 · App. 08/729,814
Variable twist level yarn
Inventor:
Jack G. Haselwander
Patented Case
View Patent ↗
Granted: Jan 13, 1998
Filed: Oct 8, 1996
Inventor
Jack G. Haselwander
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.