Granted Patent
Utility
US 5,139,128 · App. 07/500,029
Chute for controlling the motion of a token moving by gravity through a token-receiving device
Inventors:
Ralph H. Carmen, John W. Van Horn
Patented Case
View Patent ↗
Granted: Aug 18, 1992
Filed: Mar 27, 1990
Inventors
Ralph H. Carmen
John W. Van Horn
Assignee (at issue)
Ducan Industries Parking Control Corp.
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.