Granted Patent
Utility
US 6,154,324 · App. 09/205,716
Macro lens system
Inventors:
Masayuki Murata, Takayuki Ito
Patented Case
View Patent ↗
Granted: Nov 28, 2000
Filed: Dec 4, 1998
Inventors
Masayuki Murata
Takayuki Ito
Assignee (at issue)
Asahi Kogaku Kogyo Kabushiki Kaisha
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.