Granted Patent
Utility
US 6,608,304 · App. 09/676,819
Automatic background ejection (ABE)
Inventors:
Duane P. Littlejohn, Thomas Knudsen
Patented Case
View Patent ↗
Granted: Aug 19, 2003
Filed: Oct 2, 2000
Inventors
Duane P. Littlejohn
Thomas Knudsen
Assignee (at issue)
SIEMENS ENERGY & AUTOMATION, INC.
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.