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The Patent Garden

Plant

Robinia

2 US plant patents name this plant. 2 have expired, so those cultivars are free to propagate and sell.

Already in the public domain — 2 cultivars

Most recently freed first. Anyone may propagate and sell these plants — though the name it is sold under may still be a live trademark.

Botanically this is Robinia. A patent expiring frees the plant, and its cultivar name with it — cultivar names cannot be trademarked. Any brand name it is sold under is a separate thing and may still be owned.