Granted Patent
Utility
US 6,508,717 · App. 09/847,029
Skiing facilities capable of changing shape of surface of ski slope and method for changing shape of surface of ski slope of skiing facilities
Inventor:
Minoru Katayama
Patented Case
View Patent ↗
Granted: Jan 21, 2003
Filed: May 1, 2001
Inventor
Minoru Katayama
Assignee (at issue)
Kabushikikaisha Piste Snow Industries
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.