Granted Patent
Utility
US 6,138,521 · App. 09/457,941
Sequential air sampler with automatic sample collector changer
Inventors:
Lauren R. Basch, Harvey Patashnick
Patented Case
View Patent ↗
Granted: Oct 31, 2000
Filed: Dec 9, 1999
Inventors
Lauren R. Basch
Harvey Patashnick
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.