Granted Patent
Utility
US 6,471,273 · App. 09/638,249
Lifting magnet with roller cam release mechanism
Inventors:
Peter Friedrich, Bud Shear
Patented Case
View Patent ↗
Granted: Oct 29, 2002
Filed: Aug 14, 2000
Inventors
Peter Friedrich
Bud Shear
Assignee (at issue)
Industrial Magnetics, 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.