04880237 is referenced by 319 patents and cites 4 patents.

A slot machine requiring no game media at all and comprising a game data processing unit which is provided with an input unit for specific data, a storage unit, an arithmetic processing unit, a printer, and a display; and a slot machine body which is provided with a pattern display mechanism, a starting lever, stopping buttons, a win decision unit, and a display for the input data and the results of arithmetic processing. The game data processing unit printer is operative for printing the input data and an incorrect version of the input data on opposing sides of a card and issuing the card to a player for enhanced security. Data that are the same as the specific data input in the data processing unit are input in an input unit for the specific data on the slot machine side so that a game can be started, and the game is allowed to progress or is stopped by operating the specific data input unit on the machine side.

Title
Tokenless slot machine system
Application Number
7/139313
Publication Number
4880237
Application Date
December 29, 1987
Publication Date
November 14, 1989
Inventor
Ryutaro Kishishita
109 Yamatecho, Naka-ku, Yokohama, Kanagawa
JP
Agent
Joseph M Killeen
L Lawton Rogers III
IPC
G06F 15/28
A63B 67/00
A63F 9/22
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