Granted Patent
Utility
US 6,700,227 · App. 09/808,591
Direct electrodynamic linear drive
Inventor:
Ralf Hartramph
Patented Case
View Patent ↗
Granted: Mar 2, 2004
Filed: Mar 14, 2001
Inventor
Ralf Hartramph
Assignee (at issue)
FESTO AG & CO.
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.