Granted Patent
Utility
US 6,722,097 · App. 09/904,152
Plastic slab bolster upper
Inventors:
Dale Haslem, Ken Lee
Patented Case
View Patent ↗
Granted: Apr 20, 2004
Filed: Jul 12, 2001
Inventors
Dale Haslem
Ken Lee
Assignee (at issue)
Aztec Concrete Accessories, 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.