Granted Patent
Utility
US 6,744,498 · App. 09/793,013
Method and device for the optical detection of foreign fibers and other impurities in a longitudinally traveling yarn
Inventors:
Herbert Henze, Olav Birlem
Patented Case
View Patent ↗
Granted: Jun 1, 2004
Filed: Feb 26, 2001
Inventors
Herbert Henze
Olav Birlem
Assignee (at issue)
W. Schlafhorst AG & Co.
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.