Granted Patent
Utility
US 4,419,012 · App. 06/183,805
Position measuring system
Inventors:
Michael D. Stephenson, Winston A. Waller
Patented Case
View Patent ↗
Granted: Dec 6, 1983
Filed: Sep 3, 1980
Inventors
Michael D. Stephenson
Winston A. Waller
Assignee (at issue)
Elliott Brothers (London) 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.