Granted Patent
Utility
US 4,533,407 · App. 06/248,798
Radial orientation rare earth-cobalt magnet rings
Inventors:
Dilip K. Das, Kaplesh Kumar, Ernest C. Wettstein
Patented Case
View Patent ↗
Granted: Aug 6, 1985
Filed: Mar 30, 1981
Inventors
Dilip K. Das
Kaplesh Kumar
Ernest C. Wettstein
Assignee (at issue)
The Charles Stark Draper Laboratory, Inc.
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.