Granted Patent
Utility
US 5,754,514 · App. 08/728,262
Phase controlled evanescent field systems and methods for optical recording and retrieval
Inventor:
John M. Guerra
Patented Case
View Patent ↗
Granted: May 19, 1998
Filed: Oct 8, 1996
Inventor
John M. Guerra
Assignee (at issue)
Polaroid Corporation
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.