Granted Patent
Utility
US 4,569,445 · App. 06/543,661
Apparatus for measuring the thickness of disc-like articles
Inventors:
William S. Kovats, Charles T. Pratt
Patented Case
View Patent ↗
Granted: Feb 11, 1986
Filed: Oct 19, 1983
Inventors
William S. Kovats
Charles T. Pratt
Assignee (at issue)
AT&T Technologies Incorporated
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.