Granted Patent
Utility
US 4,701,711 · App. 06/857,310
Nuclear magnetic resonance apparatus with switched attenuator
Inventors:
Reginald A. Willard, William S. Percival
Patented Case
View Patent ↗
Granted: Oct 20, 1987
Filed: Apr 30, 1986
Inventors
Reginald A. Willard
William S. Percival
Assignee (at issue)
NATIONAL RESEARCH DEVELOPMENT 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.