Granted Patent
Utility
US 6,601,862 · App. 09/812,591
Tricycle and intermediate frame for tricycle
Inventor:
Heinz Kettler
Patented Case
View Patent ↗
Granted: Aug 5, 2003
Filed: Mar 21, 2001
Inventor
Heinz Kettler
Assignee (at issue)
Heinz Kettler GmbH & Co. KG
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.