Granted Patent
Utility
US 4,376,474 · App. 06/251,524
Automatic brake speed bleed system
Inventors:
James H. Tunnell, Hugh V. Piper
Patented Case
View Patent ↗
Granted: Mar 15, 1983
Filed: Oct 1, 1980
Inventors
James H. Tunnell
Hugh V. Piper
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.