Granted Patent
Utility
US 4,648,791 · App. 06/738,788
Rotor, consisting essentially of a disc requiring cooling and of a drum
Inventor:
Franz Kreitmeier
Patented Case
View Patent ↗
Granted: Mar 10, 1987
Filed: May 29, 1985
Inventor
Franz Kreitmeier
Assignee (at issue)
BBC Brown, Boveri & Company Ltd.
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.