You can freely build on How TinkerToy's Original Wooden Construction Blocks Work
This patent expired in 1934. 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
Individual
Patent granted
1914
Expired
1934
Forward citations
41
What this patent covers
The invention describes a construction toy consisting of wooden sticks and circular discs or hubs. The hubs feature multiple holes drilled around their perimeter and center, allowing the sticks to be inserted to create rigid geometric shapes. By connecting these components in various configurations, children can build structures like windmills, bridges, or towers. The system relies on the friction between the stick ends and the hub holes to hold the assembly together without needing glue or screws.
What is now free to use
All 0 claims of US 1113371 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 plastic construction systems like LEGO which use interlocking studs.
Does not cover magnetic construction sets that use poles and metal spheres.
Does not cover motorized or electronic building kits.
Does not cover blocks that rely on gravity or stacking alone without mechanical insertion.
Who is building on this today
The TinkerToy brand is currently owned by Basic Fun!, which continues to produce updated versions of the construction system. Modern STEM toy manufacturers often reference these modular connection principles in their own building sets.
Products built on expired version of this technology
Original wooden TinkerToy sets
Classic mid-century educational building kits
How to cite this patent in your documentation
Individual. US Patent 1113371. Toy construction-blocks.. Granted 1914, expired 1934. 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.