Granted Patent
Utility
US 4,539,835 · App. 06/589,902
Calibration apparatus for capacitance height gauges
Inventors:
John R. Shambroom, Alan P. Sliski
Patented Case
View Patent ↗
Granted: Sep 10, 1985
Filed: Mar 14, 1984
Inventors
John R. Shambroom
Alan P. Sliski
Assignee (at issue)
Control Data Corporation
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.