G09 EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
Description
G09 encompasses diverse technologies and systems for information presentation, protection, and communication. This broad class includes educational devices and methods, cryptographic systems for secure data transmission and authentication, visual display technologies, advertising mechanisms, and security seals or marks. The classification serves as a top-level category that branches into specialized subclasses covering everything from chalk boards and projectors to encryption algorithms, LED/LCD displays, and anti-counterfeiting measures. Adjacent classes in Section G handle more specific physics-based technologies, while G09 focuses on the systematic organization and presentation of information across these multiple application domains.
5 direct subcodes
Child Classifications
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- G09B EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS (devices for psychotechnics or for testing reaction times A61B5/16; games, sports, amusements A63; projectors, projector screens G03B)
- G09C CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
- G09D RAILWAY OR LIKE TIME OR FARE TABLES; PERPETUAL CALENDARS (calendar blocks B42D5/04; clockwork driven G04B; comprising computing means G06C)
- G09F DISPLAYING; ADVERTISING; SIGNS; LABELS OR NAME-PLATES; SEALS
- G09G ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00)