Granted Patent
Utility
US 6,283,383 · App. 09/485,567
Rail system
Inventors:
Helmuth Blank, Bernd Pahl
Patented Case
View Patent ↗
Granted: Sep 4, 2001
Filed: Feb 11, 2000
Inventors
Helmuth Blank
Bernd Pahl
Assignee (at issue)
Phoenix, LLC
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.