Granted Patent
Utility
US 5,411,391 · App. 08/044,305
Prestress device
Inventors:
Peter Albrecht, Michael Linke, Marek Peterko
Patented Case
View Patent ↗
Granted: May 2, 1995
Filed: Apr 7, 1993
Inventors
Peter Albrecht
Michael Linke
Marek Peterko
Assignee (at issue)
Krupp Corpoplast Maschinenbau 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.