One assignee leads the ranked field with 50 records, far ahead of the fifth-ranked entity at 5 and the tenth at 1. The strongest co-assignee links in the dataset connect that leader to two affiliated entities, an intellectual-property holding company and a glass-investment company, each pair appearing together 7 times. This pattern is consistent with a single operating group filing through several related legal entities rather than three separate competitors, so a freedom-to-operate check should treat them as one claim family.

The filing trend peaked at 9 records in 2019 and has declined since, reaching 0 in the latest partial year. Because publication typically lags filing by around 18 months, the most recent one or two years are always undercounted and should not be read as an abrupt stop. Even allowing for that lag, the multi-year decline from the 2019 peak predates the most recent reporting gap, suggesting genuine cooling rather than a pure lag artefact.

Of the 80 records in scope, 90.0% classify under A01G, horticulture and forestry, meaning most claims describe the greenhouse structure and its integration with airflow rather than standalone HVAC hardware. Only 8.8% carry an F24F air-conditioning and ventilation classification, and food preservation, foods and beverages, vehicle HVAC, gasification and coating classes each account for a few percent. A record can carry more than one class, so these percentages sum to more than 100%, but the pattern is clear: the mechanical dehumidification and air-conditioning layer is thinly claimed compared with the horticultural integration layer.