Granted Patent
Utility
US 4,422,263 · App. 05/942,428
Gear changing mechanism for toy vehicle driving devices
Inventor:
Hiroshi Masubuchi
Patented Case
View Patent ↗
Granted: Dec 27, 1983
Filed: Sep 14, 1978
Inventor
Hiroshi Masubuchi
Assignee (at issue)
Tonka Corporation
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.