Granted Patent
Utility
US 5,628,407 · App. 08/349,627
Method and apparatus for separation of magnetically responsive spheres
Inventors:
Douglas C. Gilbert, Peter G. Cable
Patented Case
View Patent ↗
Granted: May 13, 1997
Filed: Dec 5, 1994
Inventors
Douglas C. Gilbert
Peter G. Cable
Assignee (at issue)
Bolt, Beranek and Newman 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.