Granted Patent
Utility
US 4,879,855 · App. 07/183,730
Attachment and reinforcement member for molded construction forms
Inventor:
John L. Berrenberg
Patented Case
View Patent ↗
Granted: Nov 14, 1989
Filed: Apr 20, 1988
Inventor
John L. Berrenberg
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.