Granted Patent
Utility
US 4,864,158 · App. 07/149,609
Rapid signal validity checking apparatus
Inventors:
Alfred R. Koelle, Donald F. Speirs, Peter L. Hendrick
Patented Case
View Patent ↗
Granted: Sep 5, 1989
Filed: Jan 28, 1988
Inventors
Alfred R. Koelle
Donald F. Speirs
Peter L. Hendrick
Assignee (at issue)
AMTECH, LLC
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.