Granted Patent
Utility
US 4,818,311 · App. 07/005,711
Methods of and apparatus for heating a moving metallic strand material
Inventors:
Bruce B. Boehlke, Stephen T. Zerbs
Patented Case
View Patent ↗
Granted: Apr 4, 1989
Filed: Jan 21, 1987
Inventors
Bruce B. Boehlke
Stephen T. Zerbs
Assignee (at issue)
American Telephone and Telegraph Company, AT&T Technologies, Inc.
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.