Granted Patent
Utility
US 4,296,917 · App. 06/137,068
Contoured cable roller
Inventors:
Ralph R. Day, B. James Wulff
Patented Case
View Patent ↗
Granted: Oct 27, 1981
Filed: Apr 3, 1980
Inventors
Ralph R. Day
B. James Wulff
Assignee (at issue)
Caterpillar Tractor Co.
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.