Granted Patent
Utility
US 5,115,439 · App. 07/443,560
Pole piece to shape axial magnetic field in gas laser
Inventor:
Neil Howard
Patented Case
View Patent ↗
Granted: May 19, 1992
Filed: Nov 29, 1989
Inventor
Neil Howard
Assignee (at issue)
Spectra Physics Lasers, 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.