Granted Patent
Utility
US 6,555,822 · App. 09/626,659
Method for identification of plastic materials by optical measurements
Inventor:
Evangelos Zoidis
Patented Case
View Patent ↗
Granted: Apr 29, 2003
Filed: Jul 27, 2000
Inventor
Evangelos Zoidis
Assignee (at issue)
Sony International (Europe) 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.