Granted Patent
Utility
US 4,299,396 · App. 06/197,831
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Inventors:
Danny J. Becker, Ronald L. Satzler, Keith E. Koch
Patented Case
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Granted: Nov 10, 1981
Filed: Mar 12, 1980
Inventors
Danny J. Becker
Ronald L. Satzler
Keith E. Koch
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.