Granted Patent
Utility
US 6,644,346 · App. 09/687,971
Spring-loaded tandem control valve
Inventors:
Hermann-Josef Conrads, Erwin Laurer, Jurgen Model
Patented Case
View Patent ↗
Granted: Nov 11, 2003
Filed: Oct 16, 2000
Inventors
Hermann-Josef Conrads
Erwin Laurer
Jurgen Model
Assignee (at issue)
Framatome ANP
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.