Granted Patent
Utility
US 6,138,061 · App. 08/844,346
Onboard orbit propagation using quaternions
Inventors:
James J. McEnnan, Jennifer Warner
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Apr 18, 1997
Inventors
James J. McEnnan
Jennifer Warner
Assignee (at issue)
HUGHES ELECTRONICS LIMITED
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.