How to check U.S. patent categories

D26 is a patent related to lighting. Specific classification The United States Patent Classification System (hereinafter referred to as USPC) organizes all U.S. patent documents and other technical documents subordinate to the technical subject according to the technical subject, forming a collection of documents in a certain number of ranges. There are major categories and sub-categories in USPC. Each major category describes different technical topics, while the sub-categories describe the process, structural features and functional characteristics of the technical topics included in the major categories. The combination of "major class/subclass" becomes a complete classification number. For example, the identifier "2/456" indicates subclass 456 (body covering) in class 2 (clothing). A subclass is the smallest grouping of technical topics in the USPC. A document can belong to multiple document collections, that is, the document can have more than one classification. The technical content disclosed in the document is the basis for assigning the classification to the document. USPC includes the following contents: 1) Classification Manual (MOC, The Manual of Classification) is sorted according to all valid USPC classifications. Its main content appears in the form of class schedules, that is, the MOC is composed of various major class schedules. A major category table is a list of all subcategories in the major category, sorted from top to bottom in the table according to classification priority rules, that is, the ones with the lowest complexity and comprehensiveness are at the bottom of the table. The category table in the MOC is sorted numerically, for example, category 2 is listed before category 224. The current MOC has no paper format and is only published in HTML and PDF electronic formats, which can be obtained from the USPTO website. 2) Definition of major categories and minor categories. All major categories and most subcategories are defined. Category and subcategory definitions are detailed descriptions of technical topics that allow documents to be correctly classified into subcategories within major categories. 3) Index to the U.S. Patent Classification System is the index of MOC. It describes technical topics in alphabetical order and uses common terms, and is used to guide users into subcategories in the MOC that are broadly related to the technical topic. 4) Classified Data System (CDS) is a database and automated program that manages and stores classified data. The database is named the Master Classification File (MCF), and the content is the classification information specified for the document. MCF can be used to identify the classification of a document, and can also be used to identify all U.S. patent documents that contain a USPC classification. 5) The United States Patent Classification Standards and Procedures (USPCLASP) is the official guide for handling reclassification projects, including classifying documents into USPC, creating new categories and subclasses, and modifying and canceling existing categories and subclasses. Modifications to USPC standards and examples between two adjacent versions of USPCLASP are reflected in the Classification Bulletins published from time to time by the Office of Patent Classification. USPC can facilitate effective retrieval of relevant technical literature. Classifying U.S. patent documents using the USPC is a necessary step for the USPTO to review patent applications. In order to include new technical fields in more detail and cope with the growing volume of literature, the USPC is revised periodically. The USPC revision requires reclassification, that is, reclassification of documents through the implementation of a reclassification project.

Major categories of U.S. design patent classification D1 Edible products

D2 Clothing and men’s clothing items

D3 Travel items and personal accessories

D4 Brush items

D5 Textile or paper products, thin materials

D6 Displays

D7 Equipment for preparing or using food and beverages without other characteristics

D8 Tools and hardwareD9 Food packaging or containers

D10 Measuring, testing or signaling instruments

D11 Jewelry, badges, decorations

D12 Transportation

D13 Equipment for generating, distributing and converting energy