Granted Patent
Utility
US 5,784,729 · App. 08/737,531
Invalid hoist
Inventors:
Robert J. Dunn, Michael George Gill, John Greaves, Richard Ian Lees, Bruce Edward Somerton
Patented Case
View Patent ↗
Granted: Jul 28, 1998
Filed: Nov 25, 1996
Inventors
Robert J. Dunn
Michael George Gill
John Greaves
Richard Ian Lees
Bruce Edward Somerton
Assignee (at issue)
Arjo 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.