Granted Patent
Utility
US 4,226,077 · App. 06/018,721
Method and apparatus for manufacturing wrapped yarns
Inventor:
Richard G. Hilbert
Patented Case
View Patent ↗
Granted: Oct 7, 1980
Filed: Mar 8, 1979
Inventor
Richard G. Hilbert
Assignee (at issue)
Leesona Corporation
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.