This landscape identifies 812 published records filed or published between 2015 and mid-2026, using a search string built around oleo-pneumatic strut and shock strut terminology combined with damping-specific terms such as metering pin, orifice damping, gas spring rate and sink rate. This is a scoped search rather than an exhaustive count of every patent touching landing gear, so figures should be read as representative of the damping-mechanism core rather than a total for undercarriage patents broadly. The 812-record set is also the denominator used for every percentage figure in this landscape.

The assignee ranking covers 79 companies counted by record, with a single leading assignee holding 414 of the 812 records in scope, more than half the field on its own. The top 5 assignees combined account for 73.4% of all records, and the top 10 account for 83.3%, showing that filing activity is heavily concentrated rather than spread across a broad competitive set. Fifth place holds 33 records and tenth place holds 10, so the drop-off outside the leading group is steep.

Filing activity peaked at 97 records in 2018 and has since pulled back; the tracked figure moved from 39 filings in 2021 to 19 in 2024, a -51% change over that span. That decline is measured only through 2024, the most recent year treated as complete, because publication lags filing by roughly eighteen months and 2025-2026 figures are still filling in. It is fair to describe filing as having cooled from its 2018 peak, but it would be wrong to read the near-zero figures in the very latest years as evidence the field has stopped.