Granted Patent
Utility
US 4,337,581 · App. 06/122,530
Target structure for use with an alignment apparatus
Inventor:
Leonard F. Eck
Patented Case
View Patent ↗
Granted: Jul 6, 1982
Filed: Feb 19, 1980
Inventor
Leonard F. Eck
Assignee (at issue)
Kansas Jack, 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.