Granted Patent
Utility
US 4,411,121 · App. 06/230,671
Structural member with truncated conical portion and composite panel including same
Inventors:
Peter Alfred Blacklin, James Dougherty, Richard J. Johnson, Donald L. Tate
Patented Case
View Patent ↗
Granted: Oct 25, 1983
Filed: Feb 2, 1981
Inventors
Peter Alfred Blacklin
James Dougherty
Richard J. Johnson
Donald L. Tate
Assignee (at issue)
Tate Architectural Products, 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.