Granted Patent
Utility
US 5,425,270 · App. 08/334,459
Valve diagnostic environmental data acquisitioner
Inventors:
Francis X. McDonald, Edward A. Siegel
Patented Case
View Patent ↗
Granted: Jun 20, 1995
Filed: Nov 4, 1994
Inventors
Francis X. McDonald
Edward A. Siegel
Assignee (at issue)
Combustion Engineering, 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.