Granted Patent
Utility
US 6,715,580 · App. 09/554,301
Gas flow-through line with sound absorption effect
Inventors:
Ralph Gerstner, Hans Kutter-Schrader
Patented Case
View Patent ↗
Granted: Apr 6, 2004
Filed: Aug 11, 2000
Inventors
Ralph Gerstner
Hans Kutter-Schrader
Assignee (at issue)
Stankiewicz GmbH
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.