Granted Patent
Utility
US 4,364,045 · App. 06/240,107
Digitized displacement transducer
Inventor:
Leo Spiegel
Patented Case
View Patent ↗
Granted: Dec 14, 1982
Filed: Mar 3, 1981
Inventor
Leo Spiegel
Assignee (at issue)
Northrop 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.