Granted Patent
Utility
US 4,489,273 · App. 06/393,184
Apparatus for measuring rotational velocity of a shaft
Inventors:
Richard L. Orner, Jr., Charles W. Smith, Jr.
Patented Case
View Patent ↗
Granted: Dec 18, 1984
Filed: Jun 28, 1982
Inventors
Richard L. Orner, Jr.
Charles W. Smith, Jr.
Assignee (at issue)
Allis-Chalmers 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.