Granted Patent
Utility
US 4,401,279 · App. 06/296,897
Synchronously counter-rotating intermeshing differential speed crusher roll assembly
Inventors:
Achilles P. DeVita, Manley C. Watkins
Patented Case
View Patent ↗
Granted: Aug 30, 1983
Filed: Aug 27, 1981
Inventors
Achilles P. DeVita
Manley C. Watkins
Assignee (at issue)
General Steel Industries, 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.