| More topics under "G09 - Educating; Cryptography; Display; Advertising; Seals" (513,241) |
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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 (101,298) |
| G09C - Ciphering or deciphering apparatus for cryptographic or other purposes involving the need for secrecy (15,772) |
| G09D - Railway or like time or fare tables; Perpetual calendars (1,216) |
| G09F - Displaying; Advertising; Signs; Labels or name-plates; Seals (167,165) |
| G09G - Arrangements or circuits for control of indicating devices using static means to present variable information (227,790) |