Granted Patent
Utility
US 5,747,992 · App. 08/484,571
Materials characterization cell for polarization spectrum and streaming electrification measurements
Inventors:
Michael Allen Brubaker, George K. Frimpong
Patented Case
View Patent ↗
Granted: May 5, 1998
Filed: Jun 7, 1995
Inventors
Michael Allen Brubaker
George K. Frimpong
Assignee (at issue)
ABB Power T&D Company 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.