Haptic feedback — the vibration or tactile sensation a device produces in response to touch — is classified under Cooperative Patent Classification group G06F 3/01. The CPC scheme defines G06F 3/01 as covering "Input arrangements or combined input and output arrangements for interaction between user and computer." That is the parent group for the entire human-computer-interaction neighborhood, and haptics lives inside it because a tactile signal is, in classification terms, an output arrangement bound up with the device's input surface.

The more specific coordinate is G06F 3/016, the subgroup the CPC reserves for arrangements that provide haptic or tactile feedback to the user. When a patent describes generating a vibration, a localized buzz, or a force sensation at a touch surface, G06F 3/016 is the symbol that captures the tactile-output aspect. It sits one level below G06F 3/01 in the hierarchy, and it is the single most reliable marker for a haptics-focused filing. The broader G06F 3 subclass that contains both is itself nested under G06F 1/16 and the digital-data-processing apparatus structure, but for searching the field, G06F 3/01 and G06F 3/016 are the anchors.

"Input arrangements or combined input and output arrangements for interaction between user and computer"— CPC scheme, G06F 3/01, source

How a real haptics patent is classified

The classification is easiest to see on an actual record. Consider US9449476B2, a granted U.S. patent titled "Localized haptic feedback" (issued 2016, assignee Sentons Inc.). Its CPC symbols include G06F 3/016 — the tactile-feedback subgroup — alongside G06F 3/0416 and related touchscreen-digitizer symbols, plus G08B 6/00 for signaling by tactile means. That pairing is characteristic: a haptics patent on a touch surface is classified both for the tactile output (G06F 3/016) and for the touch input transducer it works through (G06F 3/0416, the group for digitizers such as touch screens characterized by the transducing means). One symbol describes what the device feels like; the other describes how it senses the touch.

The substance of that patent illustrates why both symbols apply. Its independent claim 1 recites "A haptic feedback system including: a plurality of remote transmitters that are remote from a location of interest on a surface of the system... wherein the remote transmitters propagate the haptic component signals through a touch screen medium of the surface and the haptic component signals interfere at the location of interest such that a localized haptic disturbance is generated at the location of interest... without a use of a motor." The claim is directed to producing a tactile disturbance at a specific point on a touch screen by interfering signals — squarely an input-and-output interaction arrangement of the kind G06F 3/01 names, with the tactile-output element that pulls in G06F 3/016.

It is worth being precise about why the same document carries several G06F 3 symbols rather than one. CPC is a faceted system: an examiner assigns a classification symbol for each technical feature a document discloses that is worth retrieving on, not a single "primary" label. The localized-feedback patent discloses a tactile-output mechanism (G06F 3/016), a touch-sensing transducer arrangement (G06F 3/0416 and neighboring digitizer groups), and a tactile-signaling function (G08B 6/00, the general group for signaling to a user by tactile means). Each of those is independently searchable, which is exactly the point of the scheme: a searcher looking only for tactile-output inventions can confine a query to G06F 3/016 and exclude the far larger body of touch-sensing patents that disclose no haptic feedback at all.

Where G06F 3/01 sits, and what it excludes

Understanding the parent group also clarifies the boundary. G06F 3/01 carries a precedence note pointing to G06F 3/16 — the group for input using speech — which takes precedence for voice interaction, so a voice-driven interface is classified there rather than under G06F 3/01. Within G06F 3/01, the sibling subgroups separate the modalities of interaction: gesture and body-movement input, eye-tracking input, and the tactile-feedback output captured by G06F 3/016. That structure means G06F 3/016 is not a catch-all for "anything that vibrates"; it is specifically the human-computer-interaction tactile-output coordinate. A vibration motor used purely as an alert in a device that is not an interactive computer interface might instead be classified under the general tactile-signaling group G08B 6/00 alone, without G06F 3/016 — the G06F symbol attaches when the tactile output is part of the user-computer interaction itself.

Reading the haptics landscape through the class

For anyone mapping the haptics field, the value of these symbols is that they let you isolate the technology from the much larger pool of general touch-input filings. A search confined to G06F 3/016 surfaces filings whose inventive contribution is the tactile feedback itself — actuator arrangements, waveform control, localized vibration, force rendering — rather than the broader universe of touch sensing under G06F 3/04. Filings that span both, like the localized-feedback patent above, indicate work at the boundary where the sensing surface and the feedback mechanism are co-designed.

A few classification practices are worth keeping straight. CPC assigns multiple symbols to a single document, so a haptics patent typically carries several — the tactile-feedback symbol, one or more touch-input symbols, and sometimes a general signaling symbol such as G08B 6/00. The presence of G06F 3/016 is the strongest single signal that a document is about haptic output specifically; the presence of G06F 3/0416 indicates the touch-sensing layer; and the parent G06F 3/01 is the umbrella that confirms the document concerns user-computer interaction at all. When coverage asks "what CPC class covers haptics," the precise answer is G06F 3/01 at the group level and G06F 3/016 for the tactile-feedback subgroup — and a granted record like US9449476B2 shows exactly how those symbols attach to a real device claim.