Granted Patent
Utility
US 5,397,227 · App. 08/181,369
Apparatus for changing both number and size of filaments
Inventors:
John A. Hodan, Robert N. Armstrong, Wei Li
Patented Case
View Patent ↗
Granted: Mar 14, 1995
Filed: Jan 13, 1994
Inventors
John A. Hodan
Robert N. Armstrong
Wei Li
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.