Granted Patent
Utility
US 4,485,339 · App. 06/502,997
Electro-magnetic alignment device
Inventor:
David Trost
Patented Case
View Patent ↗
Granted: Nov 27, 1984
Filed: Jun 10, 1983
Inventor
David Trost
Assignee (at issue)
PerkinElmer, 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.