Granted Patent
Utility
US 5,884,752 · App. 08/875,291
Elevator system
Inventors:
Simon Osborn, Gordan Crompton
Patented Case
View Patent ↗
Granted: Mar 23, 1999
Filed: Jul 23, 1997
Inventors
Simon Osborn
Gordan Crompton
Assignee (at issue)
Cromptons Leisure Machines Limited
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.