Granted Patent
Utility
US 6,820,501 · App. 10/212,529
Differential static pressure measuring and activating device and control mechanism
Inventors:
Bruce Roesler, Adrien de Borchgrave
Patented Case
View Patent ↗
Granted: Nov 23, 2004
Filed: Aug 5, 2002
Inventors
Bruce Roesler
Adrien de Borchgrave
Assignee (at issue)
Dürr 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.