Granted Patent
Utility
US 5,498,271 · App. 08/320,006
Diesel particle virtual impactor sampler
Inventors:
Virgil A. Marple, Bernard A. Olson, Kenneth L. Rubow
Patented Case
View Patent ↗
Granted: Mar 12, 1996
Filed: Oct 7, 1994
Inventors
Virgil A. Marple
Bernard A. Olson
Kenneth L. Rubow
Assignee (at issue)
MSP CORPORATION
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.