Granted Patent
Utility
US 4,715,574 · App. 06/796,911
Safety lock for materials handling system
Inventors:
Alyn R. Holt, Robert E. Matthiessen
Patented Case
View Patent ↗
Granted: Dec 29, 1987
Filed: Nov 12, 1985
Inventors
Alyn R. Holt
Robert E. Matthiessen
Assignee (at issue)
inTEST Corporation
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.