Granted Patent
Utility
US 6,071,220 · App. 09/179,838
Tool change device and tool change method
Inventors:
Tsutomu Sugihara, Hisao Sasaki, Kazuoki Sakai, Kenichiro Morita, Toshio Yasoshima
Patented Case
View Patent ↗
Granted: Jun 6, 2000
Filed: Oct 28, 1998
Inventors
Tsutomu Sugihara
Hisao Sasaki
Kazuoki Sakai
Kenichiro Morita
Toshio Yasoshima
Assignee (at issue)
Nippei Toyama 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.