Granted Patent
Utility
US 6,634,920 · App. 09/508,808
Thermoformed toy building plate
Inventor:
Carsten Michaelsen
Patented Case
View Patent ↗
Granted: Oct 21, 2003
Filed: Jul 10, 2000
Inventor
Carsten Michaelsen
Assignee (at issue)
Interlego AG
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.