Granted Patent
Utility
US 5,357,239 · App. 08/061,722
Actuating device for bus safety gate and stop sign
Inventor:
Ronald C. Lamparter
Patented Case
View Patent ↗
Granted: Oct 18, 1994
Filed: May 17, 1993
Inventor
Ronald C. Lamparter
Assignee (at issue)
Transpec, 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.