Granted Patent
Utility
US 5,243,190 · App. 07/792,809
Radioactive tracing with particles
Inventors:
Thomas R. Bandy, Donna A. Read, Edward S. Wallace
Patented Case
View Patent ↗
Granted: Sep 7, 1993
Filed: Nov 15, 1991
Inventors
Thomas R. Bandy
Donna A. Read
Edward S. Wallace
Assignee (at issue)
Protechnics International, 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.