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Patent Information & Production OptionsCard-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks · Patent CN206896783U

Patent CN206896783U: bibliographic data, legal status, family, a plain-language reading of the claims, plus customization, US compliance points and how a manufacturing project runs.

At a glance

Patent numberCN206896783U (application CN201720614716)
TypeChina utility model (实用新型) - protects product shape and structure
Original titleChess and card pieces, mahjong pieces, chess sets and mahjong sets (棋牌子、麻将牌子、棋具及麻将牌具)
Patent ownerIndividual owners (no company listed in the public record)
InventorsXiao Wei, Cao Lanyuan, Liu Dan
Filing date2017-05-27
Grant date2018-01-19
Status (China)In force - no termination recorded; a China utility model lasts at most 10 years from filing (to 2027-05-27)
Patent familyChinese filings only - no US, European, Japanese, PCT or other filings listed
Cited by2 later documents
SourceGoogle Patents (search for CN206896783U)

What the claims cover, in plain language

Claim 1 - a sheet-type game piece in defined thickness bands (0.1-0.5 mm, 0.5-5.5 mm or 5.5-7.5 mm), being a chess-type piece (Go, Chinese chess, chess, Korean chess, Junqi, Chinese checkers or gomoku) or a mahjong tile. The piece is made of at least one non-magnetic material and at least one magnetic material in the form of particles or powder smaller than the piece, arranged to form at least one magnetic flux channel with low reluctance, with a defined line-density value.

Claim 2 - seven ways of distributing the particles in the piece. Claims 3-11 - further features described in the patent, such as the soft-magnetic materials used, the finger-worn picking tool with two permanent magnets, the magnetic boards, the mahjong rack of L-shaped frames, the box frame, and thicker tiles with ridged end faces.

This is a simplified reading for orientation only. The legal scope is defined by the exact claim wording in the official Chinese document.

What this means for US production

This patent was filed only in China. It is still in force in China, so making or selling this design in China would need the owner’s permission while it lasts (at most until 2027-05-27). It has no US or other foreign counterpart and does not restrict the design outside China.

Two points to settle early:

  • Other patents may exist. Magnetic travel games, magnetic chess pieces and tile racks have a long US patent history, and newer filings cover mahjong accessories for the American market; a freedom-to-operate (FTO) review by a US patent attorney should come before tooling.
  • Choose one product first. The patent covers many games and thickness bands. A first product - for example a 4-5 mm travel mahjong set with racks, or a card-thin set with picker - should be fixed before tooling.

Customization and manufacturing

What can be customized

AreaOptions
GameChinese, American (with jokers) or Japanese mahjong; chess, Go, Chinese chess, multi-game sets
Tile thicknessCard-thin with picker, or thicker tiles with ridged ends
MaterialsMelamine, ABS or acrylic with iron or ferrite powder
Tile facesEngraved and painted, or printed designs; custom artwork
Racks and boxSteel rack frames, fold-flat box, colors and finishes
AccessoriesMagnetic play mat, finger picker, dice, scoring cards, carry pouch

Things to plan for (US market)

  • ASTM F963 and CPSIA - if the set is marketed for children 12 and under, toy safety testing, lead and phthalate limits, a Children’s Product Certificate and tracking labels apply; small pieces need a choking-hazard warning (16 CFR 1500.19) for ages 3-6.
  • Magnets - the picker’s permanent magnets must be securely fixed; loose high-power magnets would fall under the CPSC magnet rules (16 CFR 1262 for magnet sets, ASTM F963 for toys).
  • California Prop 65 - check plastics, paints and printing inks.
  • American mahjong tile sets - the US game uses a different tile count and jokers; confirm the set matches what players expect before launch.

How a project runs

  1. Inquiry - game, tile size and thickness, artwork and quantity.
  2. Design - particle loading and layout, tile faces, racks and box.
  3. Prototype - sample tiles tested for magnetic hold, picker function and wear of printed faces.
  4. Pilot run - small batch for safety tests if needed and packaging checks.
  5. Production - volume production, set packing and shipping.

Quantities & timeline

Tiles need compression or injection molds loaded with magnetic powder compound, faces need engraving or printing set-up, racks and box frames need stamping and bending dies, and magnetic mats need die-cutting. Most development time goes into the powder loading that gives enough hold without heavy tiles. Send us your game, tile size, artwork, quantity and target price and we will reply with options.

Patent drawings

Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 1
Fig. 1 - Principle of the magnetic channels formed by particles in a piece.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 2
Fig. 2 - Flux lines when a magnet approaches a piece of this design.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 3
Fig. 3 - Flux lines when a magnet approaches a solid iron piece.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 4
Fig. 4 - A round game piece.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 5
Fig. 5 - Another round game piece.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 6
Fig. 6 - A tile with ridges on both end faces.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 7
Fig. 7 - Seven particle distribution models.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 8
Fig. 8 - Enlarged magnetic pole pattern of a magnetic rubber surface.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 9
Fig. 9 - Equivalent bar magnets in a section of magnetic rubber.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 10
Fig. 10 - Flux lines in the magnetic rubber section.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 11
Fig. 11 - The finger-worn picking tool.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 12
Fig. 12 - Side view of the picking tool.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 13
Fig. 13 - Another picking tool.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 14
Fig. 14 - The tile rack.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 15
Fig. 15 - L-shaped rack frames.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 16
Fig. 16 - A packing box frame.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 17
Fig. 17 - Another packing box frame.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 18
Fig. 18 - Enlarged view of part B in figure 17.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 19
Fig. 19 - Complete box with the L-shaped frames fitted.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 20
Fig. 20 - A particle distribution principle for a model tile.
Card-Thin Magnetic Travel Mahjong and Chess Sets with Magnet Racks - Patent Fig. 21
Fig. 21 - The tile rack in use.

Drawings reproduced from the public patent document for reference.

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  3. 3 Prototype First samples for buyers to review
  4. 4 Pilot run Small first batch for launch customers
  5. 5 Volume production Repeat orders at scale

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This page is based on the public patent document CN206896783U, assigned to Individual owners (no company listed). IP2M is an independent manufacturing service and is not affiliated with, endorsed by or licensed by the patent owner. Images marked as concept renderings are illustrations, not photos of an existing product. Patent status information is provided for reference only and is not legal advice; confirm freedom to operate for your market before production. Full disclaimer.