Granted Patent
Utility
US 4,577,141 · App. 06/675,323
System for driving a movable stage
Inventors:
Kazuaki Saiki, Aiichi Ishikawa, Noriyoshi Hashimoto, Koichi Kudo, Kuniyuki Yoshikawa
Patented Case
View Patent ↗
Granted: Mar 18, 1986
Filed: Nov 27, 1984
Inventors
Kazuaki Saiki
Aiichi Ishikawa
Noriyoshi Hashimoto
Koichi Kudo
Kuniyuki Yoshikawa
Assignee (at issue)
Nippon Kogaku K.K.
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.