Granted Patent
Utility
US 5,196,170 · App. 07/877,542
Carbon particulate monitor
Inventors:
Harvey Patashnick, Georg Rupprecht
Patented Case
View Patent ↗
Granted: Mar 23, 1993
Filed: May 1, 1992
Inventors
Harvey Patashnick
Georg Rupprecht
Assignee (at issue)
Rupprecht & Patashnick 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.