Granted Patent
Utility
US 4,434,402 · App. 06/291,692
Electrical equipment
Inventor:
Michael J. Lane
Patented Case
View Patent ↗
Granted: Feb 28, 1984
Filed: Aug 10, 1981
Inventor
Michael J. Lane
Assignee (at issue)
Smiths Industries Public Limited Company
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.