Granted Patent
Utility
US 4,999,965 · App. 07/511,394
Spacer for double cage reinforcement wire mesh for concrete products
Inventors:
Jon A. Schmidgall, Galen G. Metzger
Patented Case
View Patent ↗
Granted: Mar 19, 1991
Filed: Apr 18, 1990
Inventors
Jon A. Schmidgall
Galen G. Metzger
Assignee (at issue)
Hawkeye Concrete Products Co.
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.