Granted Patent
Utility
US 4,408,376 · App. 05/900,941
Apparatus for drawing yarn
Inventors:
Charles S. Hatcher, Kenneth E. Smith
Patented Case
View Patent ↗
Granted: Oct 11, 1983
Filed: Apr 28, 1978
Inventors
Charles S. Hatcher
Kenneth E. Smith
Assignee (at issue)
Phillips Petroleum Company
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.