Granted Patent
Utility
US 5,839,307 · App. 08/874,285
Electromechanical cylinder lock with rotary release
Inventors:
Peter H. Field, Michael Lumpkin
Patented Case
View Patent ↗
Granted: Nov 24, 1998
Filed: Jun 13, 1997
Inventors
Peter H. Field
Michael Lumpkin
Assignee (at issue)
MEDECO SECURITY LOCKS, INC.
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.