Within this corpus, the most-cited records are US6864877B2 and US20020080112A1, both covering directional tactile feedback for haptic interface devices, alongside US20090072662A1 on tactile feedback circuits and US8981682B2 on asymmetric vibration waveforms from synchronized actuators. These older filings continue to accumulate citations well ahead of more recent ones, which typically means later applicants have had to draft claims around them rather than simply superseding them. That makes them the practical starting point for any freedom-to-operate check in this space.

Not currently, based on this dataset. Filings rose from a single family in 2017 to a peak of 15 in 2025, with 2022 sitting at the midpoint of 5, which is a gradual build rather than a sudden surge. Because publication lags filing by roughly 18 months, the apparent drop into 2026 is partly an artefact of incomplete data, but the overall shape is flat-to-declining rather than accelerating. Treat the field as maturing rather than in an early growth phase.

G06F, covering electric digital data processing, appears in every single record in this dataset, making it the dominant classification by a wide margin. Behind it, G08B (signalling and alarm systems), A63F (games and amusements) and B06B (mechanical vibration generation) each carry meaningful but much smaller shares. This distribution indicates that most current patent activity concerns how haptic signals are generated, timed and controlled in software rather than new transducer or actuator hardware.

The clearest gaps sit in ultrasonic mid-air haptics, perceptual-model-driven waveform tuning, power-efficient actuator drive circuits, localized multi-point haptics and solid-state actuator materials under H10N — all thinly represented relative to the dominant G06F software-control cluster. These are technically specific enough that a well-drafted first claim could stake out real ground rather than fighting through dense prior art. That said, thin representation in a search corpus does not guarantee the branch is commercially untested elsewhere, so it warrants its own targeted search before filing.

The recent-year momentum data shows several long-established assignees, including Immersion, Microsoft, Dell, Logitech, Covestro and Google, at zero filings in the latest tracked year, with Logitech showing a -100% year-on-year change. This does not necessarily mean these companies have exited the space; it more likely reflects that their core claim positions are already staked out, combined with the normal 18-month publication lag understating true recent activity. It is worth revisiting this picture once later filing years fully publish.