Granted Patent
Utility
US 4,350,913 · App. 06/178,075
Magnetic particle devices
Inventor:
Gerald R. Eddens
Patented Case
View Patent ↗
Granted: Sep 21, 1982
Filed: Aug 13, 1980
Inventor
Gerald R. Eddens
Assignee (at issue)
W. J. Industries, 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.