Granted Patent
Utility
US 6,009,820 · App. 09/052,540
Semi-submersible vessel
Inventors:
Stanley Groedecke Kellog, Scott McClure
Patented Case
View Patent ↗
Granted: Jan 4, 2000
Filed: Mar 31, 1998
Inventors
Stanley Groedecke Kellog
Scott McClure
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.