Granted Patent
Utility
US 4,335,809 · App. 06/116,627
Entertainment machines
Inventor:
John Laurence Wain
Patented Case
View Patent ↗
Granted: Jun 22, 1982
Filed: Jan 29, 1980
Inventor
John Laurence Wain
Assignee (at issue)
Barcrest Ltd.
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.