Granted Patent
Utility
US 4,431,981 · App. 06/421,220
Pressure unit assembly
Inventors:
Nelson Fuller, Rudolph Bergsma
Patented Case
View Patent ↗
Granted: Feb 14, 1984
Filed: Sep 22, 1982
Inventors
Nelson Fuller
Rudolph Bergsma
Assignee (at issue)
Chrysler Group LLC
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.