Granted Patent
Utility
US 4,889,988 · App. 07/215,729
Feedback control for scanning tunnel microscopes
Inventors:
Virgil B. Elings, John A. Gurley
Patented Case
View Patent ↗
Granted: Dec 26, 1989
Filed: Jul 6, 1988
Inventors
Virgil B. Elings
John A. Gurley
Assignee (at issue)
Digital Instruments, 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.