This dataset identifies 146 patent families published between 2015 and mid-2026 that combine seed treatment or coating terminology with manufacturing-process language and A01C planting/sowing classification. Families, not raw document counts, are the fairer unit here because they neutralise duplicate filings across jurisdictions and continuation applications. The true figure for the most recent one to two years is understated because publication typically lags filing by around 18 months.

The assignee ranking spans 146 families with only 10 co-assignee pairs, meaning most filings trace to single companies or inventors rather than joint efforts. Several historically active assignees, including large agrochemical names, show zero filings in the latest recorded year, so current leadership by volume does not necessarily reflect current filing momentum. Anyone assessing competitive position should weight recent-year activity alongside total historical family count rather than relying on either alone.

The trend is flat to declining through most of the window, with families rising from 5 in 2017 to a matching 5 at the 2022 midpoint before a peak of 13 in 2025. That shape, a flat middle followed by a late spike, is more typical of a concentrated batch of related filings from one or two applicants than of broad-based growth across the field. The partial 2026 count of 2 families should not be read as a decline given the normal reporting lag.

IPC composition shows A01C present in nearly every family (145 of 146), while adjacent classes such as C05F (organic and waste-derived fertilisers), C07D (heterocyclic compounds) and A01G (horticulture and forestry) each appear in single digits to low double digits. That gap suggests narrowly drafted process claims connecting seed coating manufacturing to organic-waste-derived formulations or heterocyclic carrier chemistry currently sit on thinner prior art than the core coating and pelleting claims.

US20180124995A1, assigned to Seed Enhancements LLC and published in 2018, covers seed coating compositions and manufacturing processes built around an effective amount of clay mineral to reduce dusting and improve coated-seed quality. It blocks manufacturing methods that fall within its specific compositional and process claims, not seed coating generally; a workable design-around needs to avoid its specific clay-mineral-based formulation and process steps. Anyone drafting in this space should read the full claim set rather than the abstract, since the abstract describes the invention broadly while the enforceable scope is narrower.