Granted Patent
Utility
US 4,457,625 · App. 06/282,552
Self calibrating contour measuring system using fringe counting interferometers
Inventors:
Allen H. Greenleaf, John T. Watson
Patented Case
View Patent ↗
Granted: Jul 3, 1984
Filed: Jul 13, 1981
Inventors
Allen H. Greenleaf
John T. Watson
Assignee (at issue)
I-TEK, 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.