Granted Patent
Utility
US 5,232,646 · App. 07/611,179
Methods of forming contoured walls
Inventors:
Peter A. Nasvik, Paul C. Nasvik
Patented Case
View Patent ↗
Granted: Aug 3, 1993
Filed: Nov 7, 1990
Inventors
Peter A. Nasvik
Paul C. Nasvik
Assignee (at issue)
Concrete Design Specialties, 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.