You can freely build on How the Board Game Monopoly Works
This patent expired in 1955. Every claim — 0 independent, 0 dependent — is now unenforceable. Anyone can use, reproduce, manufacture, sell, or offer for sale this technology without a license.
Original assignee
Parker Brothers Inc
Patent granted
1935
Expired
1955
Forward citations
177
What this patent 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 is now free to use
All 0 claims of US 2026082 are in the public domain. Specifically:
The 0 dependent claims add narrowing limitations and are also free.
What is NOT covered
Patent expiry frees this specific invention. Separately-patented improvements made after expiry may still be protected.
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.
Who is building on this today
Hasbro, which acquired Parker Brothers, continues to manage and iterate on the Monopoly brand. Numerous indie game developers build on the 'roll-and-move' and property-trading mechanics established here.
Products built on expired version of this technology
Monopoly Classic board game
Monopoly Junior
Various themed Monopoly editions
How to cite this patent in your documentation
Parker Brothers Inc. US Patent 2026082. Board game apparatus. Granted 1935, expired 1955. Now in the public domain.
Note: This is a convenience citation. Consult a patent attorney for formal freedom-to-operate analysis.
PatentBrief is an educational resource and does not provide legal advice. Patent expiration information is derived from USPTO records and may not reflect continuation patents, divisional filings, or separately-patented improvements. For commercial use or production decisions, obtain a formal freedom-to-operate (FTO) opinion from a registered patent attorney.