Granted Patent
Utility
US 4,875,277 · App. 07/256,883
Formed metal core blocking method
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: Oct 24, 1989
Filed: Oct 12, 1988
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.