Granted Patent
Utility
US 5,587,185 · App. 08/229,191
Automated system for handling and cleaning concrete pipe-making components
Inventors:
Hartzell H. Schmidgall, Jon A. Schmidgall
Patented Case
View Patent ↗
Granted: Dec 24, 1996
Filed: Apr 18, 1994
Inventors
Hartzell H. Schmidgall
Jon A. Schmidgall
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.