Granted Patent
Utility
US 4,693,404 · App. 06/810,245
Mains bursting tool
Inventors:
Malcolm Wayman, Geoffrey Ingles Mood
Patented Case
View Patent ↗
Granted: Sep 15, 1987
Filed: Dec 18, 1985
Inventors
Malcolm Wayman
Geoffrey Ingles Mood
Assignee (at issue)
British Gas
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.