Granted Patent
Utility
US 6,745,421 · App. 10/043,693
Abutment with seismic restraints
Inventors:
Robert Barrett, Albert C. Ruckman
Patented Case
View Patent ↗
Granted: Jun 8, 2004
Filed: Jan 10, 2002
Inventors
Robert Barrett
Albert C. Ruckman
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.