Granted Patent
Utility
US 6,230,552 · App. 09/463,182
Surface treatment shape evaluation system and surface treatment shape
Inventors:
Yoichi Abe, Shoichi Kameta, Ryoichi Sato
Patented Case
View Patent ↗
Granted: May 15, 2001
Filed: Jan 20, 2000
Inventors
Yoichi Abe
Shoichi Kameta
Ryoichi Sato
Assignee (at issue)
New Tokyo International Airport Authority
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.