Granted Patent
Utility
US 6,545,820 · App. 09/960,942
Zoom lens system
Inventors:
Masaru Eguchi, Takayuki Ito
Patented Case
View Patent ↗
Granted: Apr 8, 2003
Filed: Sep 25, 2001
Inventors
Masaru Eguchi
Takayuki Ito
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.