Granted Patent
Utility
US 4,918,395 · App. 07/274,407
Multipass laser amplifier with at least one expanded pass
Inventors:
John C. DiFonzo, Bertram C. Johnson
Patented Case
View Patent ↗
Granted: Apr 17, 1990
Filed: Nov 21, 1988
Inventors
John C. DiFonzo
Bertram C. Johnson
Assignee (at issue)
Spectra-Physics, 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.