Granted Patent
Utility
US 6,832,872 · App. 10/293,135
Gas discharge device for a construction vehicle
Inventors:
Mark Koelm, Thomas A. Roth
Patented Case
View Patent ↗
Granted: Dec 21, 2004
Filed: Nov 13, 2002
Inventors
Mark Koelm
Thomas A. Roth
Assignee (at issue)
Blaw-Know Construction Equipment 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.