Granted Patent
Utility
US 6,236,747 · App. 09/134,654
System and method for image subtraction for ball and bumped grid array inspection
Inventors:
Steven J. King, Jonathan Edmund Ludlow
Patented Case
View Patent ↗
Granted: May 22, 2001
Filed: Aug 14, 1998
Inventors
Steven J. King
Jonathan Edmund Ludlow
Assignee (at issue)
Acuity Imaging, LLC
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.