Granted Patent
Utility
US 6,355,048 · App. 09/426,298
Spherical linkage apparatus
Inventors:
Boyang Hong, Arthur G. Erdman
Patented Case
View Patent ↗
Granted: Mar 12, 2002
Filed: Oct 25, 1999
Inventors
Boyang Hong
Arthur G. Erdman
Assignee (at issue)
Geodigm Corporation
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.