Granted Patent
Utility
US 6,412,789 · App. 10/039,347
Semi-trailer suspension air spring control system
Inventors:
Phillippi R. Pierce, Jesse W. Cervantez
Patented Case
View Patent ↗
Granted: Jul 2, 2002
Filed: Jan 4, 2002
Inventors
Phillippi R. Pierce
Jesse W. Cervantez
Assignee (at issue)
The Boler 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.