Granted Patent
Utility
US 5,581,631 · App. 08/309,078
Cytological system image collection integrity checking apparatus
Inventors:
William E. Ortyn, Keith L. Frost, Jon W. Hayenga
Patented Case
View Patent ↗
Granted: Dec 3, 1996
Filed: Sep 20, 1994
Inventors
William E. Ortyn
Keith L. Frost
Jon W. Hayenga
Assignee (at issue)
Neopath, 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.