Granted Patent
Utility
US 4,615,167 · App. 06/747,789
Highly entangled thread development
Inventor:
Neville G. Greenberg
Patented Case
View Patent ↗
Granted: Oct 7, 1986
Filed: Jun 25, 1985
Inventor
Neville G. Greenberg
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.