Granted Patent
Utility
US 4,326,679 · App. 06/165,301
Method and apparatus for roll changing on a winder device
Inventors:
Richard W. Phelps, Richard S. Tetro
Patented Case
View Patent ↗
Granted: Apr 27, 1982
Filed: Jul 2, 1980
Inventors
Richard W. Phelps
Richard S. Tetro
Assignee (at issue)
Black Clawson Company, 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.