IPC section B reference

IPC section B: scope, purpose and verified edition

IPC section B is titled "Performing operations; transporting". The current reference edition is 2026.01. Its coverage includes manufacturing processes, manipulation, materials handling and vehicles, but that high-level heading is not an exhaustive subject-matter definition or a patent-search result. The relevant choice is which feature of a claimed invention belongs in the section, then which class, subclass and subgroup actually describes that feature. This page explains how to use the official classification as a research route, not how to obtain a legal opinion. WIPO, Guide to the IPC (2026)

Why this section has a distinctive search boundary

Section B includes operations performed on materials and the movement of objects or people. This makes the task performed by the invention more informative than the purchaser's industry. A robot arm, a vehicle-mounted manipulation system and a packaging line may share motors and controllers but be separated by different operational functions. Decide whether the patent's contribution concerns cutting, forming, conveying, gripping or transport architecture. Only after that should a candidate classification hierarchy be chosen.

Official class families and candidate research routes

The following class-level routes are examples for investigating manufacturing processes, manipulation, materials handling and vehicles. They are deliberately class-level, not fabricated subgroup allocations. An individual patent may belong to one, several or none of these candidates after examination of its actual technical disclosure. Each route must be checked against the official IPC scheme and the relevant subclass notes before it becomes a filter in a recorded research protocol.

An illustrative subordinate candidate is B25J, concerning Manipulators and chambers provided with manipulation devices. Verify its current title, inclusions and exclusions in the scheme instead of using the abbreviated label here as a complete definition. A class table provides an orientation map but cannot resolve conflicts between function, application, manufacturing route and detailed apparatus claims. When a class differs in IPC and CPC at lower levels, keep both pathways documented rather than asserting a direct correspondence. WIPO, Guide to the IPC (2026)

Worked research example: separating physical features from application terms

Take an automated parcel-handling installation that receives packages, identifies parcels, positions a robotic gripper and transfers items onto conveyors. The handling path can invite examination of B65, while the manipulator mechanism suggests B25J and vision or control may lead to G. If a claim is directed to a moving vehicle rather than a fixed line, the route may also intersect vehicle classes. Mapping each claim limitation to a physical action prevents the vague label 'warehouse automation' from determining the search scope by itself.

In an IPC-oriented search, write each claim feature as a neutral technical statement, then use the 2026.01 hierarchy to test possible subclasses. Record a broad initial search and a narrower group-based search. Review a sample that appears in the broad set but not the narrow one; this can reveal an omitted class or terminology change. Preserve the source IPC symbols printed on retrieved patents instead of replacing them with your modern working classification.

Boundary tests and neighboring classifications

Distinguish a mechanism that changes a material from one that merely moves it. A stamping process may be classified under operations even when performed by a robotic machine. Conversely, a steering or chassis feature should not be forced into a manufacturing subclass because the inventor works for an automotive supplier. General-purpose mechanisms may overlap Section F, which is organized around mechanical elements, engines and thermal devices. The boundary is best tested by comparing the claimed result and the immediate technical means.

A useful boundary matrix for this section compares: Robotic manipulation versus conveyors; vehicle controls versus production operations; physical processing versus generic mechanical components. For each pair, record the feature said to distinguish the invention, the candidate class from the relevant scheme, the exclusion or limiting note, and the documents found using the competing route. The objective is to explain why a search set differs, not to create an exhaustive list of all inventions in the industry. A cross-section candidate should be retained whenever it captures a technically plausible part of the claim.

IPC hierarchy and revision controls

The IPC section heading joins 'performing operations' and 'transporting', but search plans should treat those as separate functions. Class and subclass symbols provide a repeatable bridge from human descriptions to documents; the broad B label does not. For an older industrial patent, first record the IPC version used on the publication, then inspect the current 2026.01 class and any transfer under the revision concordance. Do not overwrite historical classification labels as though they were current assignments. WIPO, Guide to the IPC (2026)

For IPC section B, compare present search results with the historical classification of documents from earlier years. WIPO provides past schemes, the current 2026.01 publication and revision support. Annotate any changes in class or subgroup boundaries before reporting a trend. The 2026 guide explains that subgroup wording can depend on parent titles and indentation; reading a lone excerpt can therefore materially misstate the coverage of a patent-search filter. WIPO guide: layout and symbols.

Reproducible evidence packet for this section

A strong B-section search packet records the workpiece, operation, moving element, tool, control signal and output. For a manufacturing apparatus, include the sequence of actions and the features that make it different from a generic machine. For transport inventions, record whether control, energy storage, navigation or passenger safety is the central claim limitation. Those decisions determine whether class searches belong in B alone or need extensions into F, G and H. Keep process claims distinct from apparatus claims throughout the search record.

1. Identify the patent or technical question and record the inventive feature being investigated.
2. Capture the current 2026.01 IPC section, class and candidate subclass from official source pages.
3. Record included and excluded subject matter, limiting references, and any related sections.
4. Run a functional-language search separately from the classification-based query.
5. Compare result sets at patent-publication and family level; retain false-negative and false-positive examples.
6. Date the source consultation and disclose uncertainty or incomplete classification mappings.

How to assess completeness without making unsupported conclusions

Do not infer technical novelty from a robot's use case. The same manipulator may operate in agriculture, surgery or a warehouse, and a disclosed application need not delimit the relevant prior-art universe. Build one recall-oriented query using functional verbs such as grasp, convey, rotate or position, and another using the selected class families. Compare the documents retrieved by both. A mismatch is useful evidence of an incomplete classification hypothesis rather than a reason to delete inconvenient publications.

For performing operations; transporting, quality of a classification-based research result should be measured through documented decisions: was the relevant technical function described, were adjacent classes evaluated, could another reviewer reconstruct the symbol list, and did the method inspect material documents rather than rely on bibliographic codes alone? The scheme itself does not provide a ranking of patent strength. Evidence gaps should be shown in the result, particularly when published sources are incomplete, data platforms use different classification vintages or the technical field crosses section boundaries.

Primary authorities and related comparison

• WIPO official Guide to the IPC (2026)
• WIPO authentic IPC publication
• WIPO edition 2026.01 notice

This research page does not assign definitive symbols to a particular invention. For the corresponding CPC section, check its independent scheme, definitions and version before translating search terms. Consult an appropriate professional for claim-specific legal decisions; a public classification guide explains evidence routes but does not determine legal status, novelty, inventiveness or freedom to operate.