Granted Patent
Utility
US 5,796,487 · App. 08/671,708
Dark field, photon tunneling imaging systems and methods for optical recording and retrieval
Inventor:
John M. Guerra
Patented Case
View Patent ↗
Granted: Aug 18, 1998
Filed: Jun 28, 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.