IP Library Granted Patent US 5,331,276
Granted Patent Utility
US 5,331,276 · App. 07/945,474

Apparatus for passively measuring the velocity of a ferrous vehicle along a path of travel

Inventors: Donald G. Polvani, David G. Ellerbrake
Patented Case View Patent ↗
Granted: Jul 19, 1994 Filed: Sep 16, 1992
Inventors
Donald G. Polvani
David G. Ellerbrake
Assignee (at issue)
Westinghouse Electric Company 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.

Order Certified Copies
Most orders are placed with the USPTO same day — all within 24 business hours.
Order via The Patent Place →
Pre-filled with this patent's details
Quick Facts
Patent No.
US 5,331,276
App. No.
07/945,474
Filed
1992-09-16
Granted
1994-07-19
Kind
A