Granted Patent
Utility
US 6,729,821 · App. 10/086,672
Expansion bolt
Inventors:
Karl Guthrie, Joseph Schwartz
Patented Case
View Patent ↗
Granted: May 4, 2004
Filed: Feb 28, 2002
Inventors
Karl Guthrie
Joseph Schwartz
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.