Granted Patent
Utility
US 5,044,737 · App. 07/379,086
Double axial gradient lens and process for fabrication thereof
Inventor:
Richard Blankenbecler
Patented Case
View Patent ↗
Granted: Sep 3, 1991
Filed: Jul 13, 1989
Inventor
Richard Blankenbecler
Assignee (at issue)
Isotec Limited
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.