Granted Patent
Utility
US 4,498,803 · App. 06/509,184
Moveable lane barrier locking system
Inventor:
John P. Quittner
Patented Case
View Patent ↗
Granted: Feb 12, 1985
Filed: Jun 29, 1983
Inventor
John P. Quittner
Assignee (at issue)
Quick-Steel Engineering Pty 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.