Granted Patent
Utility
US 4,640,620 · App. 06/566,688
Arrangement for rapid depth measurement using lens focusing
Inventor:
Richard Schmidt
Patented Case
View Patent ↗
Granted: Feb 3, 1987
Filed: Dec 29, 1983
Inventor
Richard Schmidt
Assignee (at issue)
Robotic Vision Systems, Inc.
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.