Granted Patent
Utility
US 6,155,324 · App. 09/280,442
Apparatus and method for operating a door
Inventors:
Edward Elliott, Richard Gordon Cookson
Patented Case
View Patent ↗
Granted: Dec 5, 2000
Filed: Mar 29, 1999
Inventors
Edward Elliott
Richard Gordon Cookson
Assignee (at issue)
The Cookson 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.