Granted Patent
Utility
US 6,793,203 · App. 10/220,367
Hoisting gear
Inventors:
Peter Heinrichs, Albrecht Heinrichs
Patented Case
View Patent ↗
Granted: Sep 21, 2004
Filed: Oct 17, 2002
Inventors
Peter Heinrichs
Albrecht Heinrichs
Assignee (at issue)
Wirth Maschinen-und Bohrgerate-Fabrik 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.