Granted Patent
Utility
US 4,042,877 · App. 05/618,425
Inspection apparatus and method for detecting flaws in serially fed substantially cylindrical objects
Inventor:
Walter J. Sieverin
Patented Case
View Patent ↗
Granted: Aug 16, 1977
Filed: Oct 1, 1975
Inventor
Walter J. Sieverin
Assignee (at issue)
American Can Company
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.