Granted Patent
Utility
US 4,703,176 · App. 06/741,179
Compact polyphase optical position encoder
Inventors:
Peter Hahn, Thomas R. Stone, William G. Moon, Joel N. Harrison
Patented Case
View Patent ↗
Granted: Oct 27, 1987
Filed: Jun 4, 1985
Inventors
Peter Hahn
Thomas R. Stone
William G. Moon
Joel N. Harrison
Assignee (at issue)
Plus Development
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.