How the Board Game Monopoly Works

The 1935 patent for the board game Monopoly, covering the layout of spaces and the rules for moving tokens around a track to buy and trade property.

What it covers

The patent defines a board game apparatus consisting of a continuous path of spaces arranged in a square loop. Players move tokens along this path based on random number generation, typically dice rolls. The board includes specific designated spaces representing real estate properties that players can purchase, develop with structures, and collect rent from other players who land on them.

What it doesn't cover

• —Does not cover the underlying economic theory of land value taxation.
• —Does not cover digital versions of the game implemented on computers or consoles.
• —Does not cover variations of the board that do not follow the specific square-loop path configuration.
• —Does not cover the specific artwork, character names, or branding associated with the game.

The clever bit

The innovation was the combination of a closed-loop track with a resource-management system where the board itself acts as a persistent ledger for player wealth and property ownership.

Why it matters

This patent protected the core mechanics of what became the most commercially successful board game in history. It established the standard for property-trading games and remains a foundational example of how game mechanics can be protected as intellectual property.

Real-world examples

• 1.Monopoly Classic board game
• 2.Monopoly Junior
• 3.Various themed Monopoly editions