Granted Patent
Utility
US 4,514,643 · App. 06/609,903
Parallel valve rotary machine control system
Inventor:
Edward J. Condrac
Patented Case
View Patent ↗
Granted: Apr 30, 1985
Filed: May 11, 1984
Inventor
Edward J. Condrac
Assignee (at issue)
Elliott Turbomachinery Co., Inc.
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.