Granted Patent
Utility
US 6,085,873 · App. 09/320,935
Pneumatic elevator
Inventor:
Anselmo John Macchi
Patented Case
View Patent ↗
Granted: Jul 11, 2000
Filed: May 27, 1999
Inventor
Anselmo John Macchi
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.