Granted Patent
Utility
US 4,333,307 · App. 05/934,538
Friction rotor
Inventors:
Friedrich Schuster, Hans Hermanns
Patented Case
View Patent ↗
Granted: Jun 8, 1982
Filed: Aug 17, 1978
Inventors
Friedrich Schuster
Hans Hermanns
Assignee (at issue)
Kugelfischer Georg Schafer & 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.