Granted Patent
Utility
US 4,935,932 · App. 07/232,446
Apparatus using induced birefringence to improve laser beam quality
Inventors:
Bertram C. Johnson, John C. DiFonzo, Richard L. Herbst
Patented Case
View Patent ↗
Granted: Jun 19, 1990
Filed: Aug 15, 1988
Inventors
Bertram C. Johnson
John C. DiFonzo
Richard L. Herbst
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.