Granted Patent
Utility
US 4,847,838 · App. 07/064,489
Circuit for testing the bus structure of a printed wiring card
Inventor:
Ivan M. Kralik
Patented Case
View Patent ↗
Granted: Jul 11, 1989
Filed: Jun 22, 1987
Inventor
Ivan M. Kralik
Assignee (at issue)
Communications Systems, 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.