Granted Patent
Utility
US 4,478,307 · App. 06/308,371
Control handle lockup
Inventors:
Ronald C. Natzke, Maurice M. Klee
Patented Case
View Patent ↗
Granted: Oct 23, 1984
Filed: Oct 5, 1981
Inventors
Ronald C. Natzke
Maurice M. Klee
Assignee (at issue)
J. I. Case 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.