Granted Patent
Utility
US 4,833,436 · App. 06/906,855
Formed metal core blocking
Inventors:
Richard W. Martin, John L. Fisher, William R. Fortenberry, Randall L. Schlake, Ronald F. Dornbrock, James D. Richerson, Kenneth E. Marrett, Sr.
Patented Case
View Patent ↗
Granted: May 23, 1989
Filed: Sep 12, 1986
Inventors
Richard W. Martin
John L. Fisher
William R. Fortenberry
Randall L. Schlake
Ronald F. Dornbrock
James D. Richerson
Kenneth E. Marrett, Sr.
Assignee (at issue)
Kuhlman 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.