Granted Patent
Utility
US 4,327,549 · App. 06/127,152
Controlled pressure upstaging and flow reduction
Inventors:
Donald L. Bianchetta, Sammy J. Rhodes
Patented Case
View Patent ↗
Granted: May 4, 1982
Filed: Mar 4, 1980
Inventors
Donald L. Bianchetta
Sammy J. Rhodes
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.