Granted Patent
Utility
US 6,152,016 · App. 09/240,263
Piston with cast passages
Inventors:
Andreas Bahr, Irvin Zwicker
Patented Case
View Patent ↗
Granted: Nov 28, 2000
Filed: Jan 29, 1999
Inventors
Andreas Bahr
Irvin Zwicker
Assignee (at issue)
Daimlerchrysler AG
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.