Granted Patent
Utility
US 6,564,660 · App. 09/799,559
Ball screw feed mechanism
Inventors:
Yoshinori Kawamura, Yoshihiro Koyanagi, Mamoru Murata, Mitsuyoshi Nishimura
Patented Case
View Patent ↗
Granted: May 20, 2003
Filed: Mar 7, 2001
Inventors
Yoshinori Kawamura
Yoshihiro Koyanagi
Mamoru Murata
Mitsuyoshi Nishimura
Assignees (at issue)
Fujitsu Limited
Fuji Photo Optical Co., Ltd.
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.