Granted Patent
Utility
US 4,738,561 · App. 06/797,449
Device for protecting wheel discs shrink-fitted on shafts against rotation relative to the shafts and method for manufacturing the same
Inventor:
Gerhard Rottger
Patented Case
View Patent ↗
Granted: Apr 19, 1988
Filed: Nov 13, 1985
Inventor
Gerhard Rottger
Assignee (at issue)
Kraftwerk Union Aktiengesellschaft
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.