Granted Patent
Utility
US 5,952,579 · App. 09/022,731
Ultra-high purity Bourdon tube pressure gauge system
Inventors:
David C. DeFrancesco, Brian T. Donahue, Louis A. Rosen, John A. Turbeville, Louis F. Bregy
Patented Case
View Patent ↗
Granted: Sep 14, 1999
Filed: Feb 12, 1998
Inventors
David C. DeFrancesco
Brian T. Donahue
Louis A. Rosen
John A. Turbeville
Louis F. Bregy
Assignee (at issue)
Dresser Industries, 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.