Granted Patent
Utility
US 5,184,707 · App. 07/831,423
Coin operated timing mechanism
Inventors:
John W. Van Horn, Ralph H. Carmen
Patented Case
View Patent ↗
Granted: Feb 9, 1993
Filed: Feb 5, 1992
Inventors
John W. Van Horn
Ralph H. Carmen
Assignee (at issue)
Duncan Industries Parking Control Systems
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.