Granted Patent
Utility
US 4,984,401 · App. 07/387,684
Device and method for housing a steel reinforcement in an area where joints are made between first and subsequently poured concrete structures
Inventor:
Michael Baldino
Patented Case
View Patent ↗
Granted: Jan 15, 1991
Filed: Jul 31, 1989
Inventor
Michael Baldino
Assignee (at issue)
DAYTON SUPERIOR 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.