Granted Patent
Utility
US 4,952,098 · App. 07/454,711
Retaining wall anchor system
Inventors:
Boyd H. Grayson, Richard J. Beak
Patented Case
View Patent ↗
Granted: Aug 28, 1990
Filed: Dec 21, 1989
Inventors
Boyd H. Grayson
Richard J. Beak
Assignee (at issue)
Ivy Steel 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.