Granted Patent
Utility
US 6,137,640 · App. 09/293,952
Program controlled beam focus to compensate for thermal changes
Inventor:
David P. Viola
Patented Case
View Patent ↗
Granted: Oct 24, 2000
Filed: Apr 19, 1999
Inventor
David P. Viola
Assignee (at issue)
Agfa NV
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.