Granted Patent
Utility
US 5,266,913 · App. 07/750,809
Screened electromagnetic coil of restricted length having optimized field and method
Inventor:
Barry Chapman
Patented Case
View Patent ↗
Granted: Nov 30, 1993
Filed: Aug 27, 1991
Inventor
Barry Chapman
Assignee (at issue)
British Technology Group USA 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.