Granted Patent
Utility
US 6,299,514 · App. 09/523,115
Double-disk polishing machine, particularly for tooling semiconductor wafers
Inventor:
Hans-Peter Boller
Patented Case
View Patent ↗
Granted: Oct 9, 2001
Filed: Mar 10, 2000
Inventor
Hans-Peter Boller
Assignee (at issue)
Peter Wolters Werkzeugmaschinen GmbH
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.