Granted Patent
Utility
US 6,778,331 · App. 10/431,464
Zoom lens system
Inventor:
Hiroyasu Ozaki
Patented Case
View Patent ↗
Granted: Aug 17, 2004
Filed: May 8, 2003
Inventor
Hiroyasu Ozaki
Assignee (at issue)
Pentax 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.