In this dataset, a combination product record is one that ties design-verification or essential-performance-requirement language to a specific engineering or human-factors test method, such as usability engineering, shipping simulation, or component dimensional tolerance. This is narrower than the full drug-delivery-device category; it isolates filings that address the design-control evidence chain rather than the drug or device mechanism alone. Readers looking for a broader delivery-device landscape should expect a larger record count than the 27 tracked here.

The ranking covers 8 assignees across all 27 records in scope, with one clear leader holding 11 records and a steep drop to the fifth-ranked assignee, which holds only 1. The top 5 assignees combined account for 88.9% of all records, meaning a small group holds nearly the entire field. This is not a top-50 or top-100 ranking; it is the complete set the data endpoint returns for this scope.

The trend shows 8 filings in 2017, the peak year, followed by a decline toward zero in the most recent partial year. The underlying reasons are not captured in the dataset itself, but the shape is consistent with a single wave of early filings rather than sustained growth, and a formal growth rate cannot be computed given the short run of complete years. Publication typically lags filing by roughly 18 months, so recent years understate true filing activity and should not be read as the field having stopped.