Granted Patent
Utility
US 6,478,123 · App. 09/769,669
Hydraulic elevator with plunger brakes
Inventors:
Ernie Glen Seggebruch, Andrew Ernest Werner
Patented Case
View Patent ↗
Granted: Nov 12, 2002
Filed: Jan 25, 2001
Inventors
Ernie Glen Seggebruch
Andrew Ernest Werner
Assignee (at issue)
KONE CORPORATION
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.