Granted Patent
Utility
US 6,782,662 · App. 10/128,095
Movable barrier operator having cable tension sensor and door lock mechanism
Inventors:
Phillip D. McCartney, Robert E. Dutka, Andrew Gavel, William Chen, Robert J. Olmsted
Patented Case
View Patent ↗
Granted: Aug 31, 2004
Filed: Apr 23, 2002
Inventors
Phillip D. McCartney
Robert E. Dutka
Andrew Gavel
William Chen
Robert J. Olmsted
Assignee (at issue)
THE CHAMBERLAIN GROUP LLC.
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.