Granted Patent
Utility
US 5,151,870 · App. 07/439,231
Apparatus and method for determining a center and measuring with reference thereto
Inventors:
James C. Beebe, Barry D. Cargould, David W. Lees, Sr.
Patented Case
View Patent ↗
Granted: Sep 29, 1992
Filed: Nov 17, 1989
Inventors
James C. Beebe
Barry D. Cargould
David W. Lees, Sr.
Assignee (at issue)
ILLINOIS TOOL WORKS 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.