Granted Patent
Utility
US 4,633,550 · App. 06/717,405
Yarn entangling apparatus
Inventors:
John E. McAliley, James R. Crozier, Jr.
Patented Case
View Patent ↗
Granted: Jan 6, 1987
Filed: Mar 29, 1985
Inventors
John E. McAliley
James R. Crozier, Jr.
Assignee (at issue)
BASF SE
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.