Granted Patent
Utility
US 4,414,440 · App. 06/280,542
Waterproof electrical switch with safety interlock
Inventor:
Stephen H. DeCoste
Patented Case
View Patent ↗
Granted: Nov 8, 1983
Filed: Jul 6, 1981
Inventor
Stephen H. DeCoste
Assignee (at issue)
Midland-Ross 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.