Granted Patent
Utility
US 4,993,136 · App. 07/368,732
Method of converting a vacuum test fixture on a board testing apparatus to a mechanical test fixture
Inventor:
Ronald K. Kerschner
Patented Case
View Patent ↗
Granted: Feb 19, 1991
Filed: Jun 19, 1989
Inventor
Ronald K. Kerschner
Assignee (at issue)
Hewlett-Packard Company, L.P.
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.