IP Library › Granted Patent US 4,976,843
Granted Patent Utility
US 4,976,843 · App. 07/474,348

Particle beam shielding

Inventors: Billy W. Ward, David Edwards, Robert A. Casella
Patented Case View Patent ↗
Granted: Dec 11, 1990 Filed: Feb 2, 1990
Inventors
Billy W. Ward
David Edwards
Robert A. Casella
Assignee (at issue)
Micron 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 4,976,843
App. No.
07/474,348
Filed
1990-02-02
Granted
1990-12-11
Kind
A