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Classification Resources
 
Class   178TELEGRAPHY
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 [List of Pre Grant Publications for class 178 subclass 1][List of Patents for class 178 subclass 1]1 MISCELLANEOUS
[List of Pre Grant Publications for class 178 subclass 2R][List of Patents for class 178 subclass 2R]  2R SYSTEMS
[List of Pre Grant Publications for class 178 subclass 3][List of Patents for class 178 subclass 3]3 Subclass 3 indent level is 1 Automatic
[List of Pre Grant Publications for class 178 subclass 18.01][List of Patents for class 178 subclass 18.01]18.01 Subclass 18.01 indent level is 1 Position coordinate determination for writing (e.g., writing digitizer pad, stylus, or circuitry)
 [List of Pre Grant Publications for class 178 subclass 21][List of Patents for class 178 subclass 21]21 Subclass 21 indent level is 1 Stenographic
[List of Pre Grant Publications for class 178 subclass 23R][List of Patents for class 178 subclass 23R]  23R Subclass 23R indent level is 1 Printing
 [List of Pre Grant Publications for class 178 subclass 43][List of Patents for class 178 subclass 43]43 Subclass 43 indent level is 1 Space induction
[List of Pre Grant Publications for class 178 subclass 45][List of Patents for class 178 subclass 45]45 Subclass 45 indent level is 1 Loaded circuit
[List of Pre Grant Publications for class 178 subclass 47][List of Patents for class 178 subclass 47]47 Subclass 47 indent level is 1 Harmonic or reed
 [List of Pre Grant Publications for class 178 subclass 49][List of Patents for class 178 subclass 49]49 Subclass 49 indent level is 1 Superposed current
 [List of Pre Grant Publications for class 178 subclass 62][List of Patents for class 178 subclass 62]62 Subclass 62 indent level is 1 Chemical
[List of Pre Grant Publications for class 178 subclass 63R][List of Patents for class 178 subclass 63R]  63R Subclass 63R indent level is 1 Cable or capacity
 [List of Pre Grant Publications for class 178 subclass 64][List of Patents for class 178 subclass 64]64 Subclass 64 indent level is 1 Coil transformer
 [List of Pre Grant Publications for class 178 subclass 65][List of Patents for class 178 subclass 65]65 Subclass 65 indent level is 1 Dynamo
[List of Pre Grant Publications for class 178 subclass 66.1][List of Patents for class 178 subclass 66.1]66.1 Subclass 66.1 indent level is 1 Alternating or pulsating current
[List of Pre Grant Publications for class 178 subclass 69R][List of Patents for class 178 subclass 69R]  69R Subclass 69R indent level is 1 Line-clearing and circuit maintenance
 [List of Pre Grant Publications for class 178 subclass 69.6][List of Patents for class 178 subclass 69.6]69.6 Subclass 69.6 indent level is 1 Call
 [List of Pre Grant Publications for class 178 subclass 2A][List of Patents for class 178 subclass 2A]2A Subclass 2A indent level is 1 Simplex-reversing periodic
 [List of Pre Grant Publications for class 178 subclass 2B][List of Patents for class 178 subclass 2B]2B Subclass 2B indent level is 1 Code changers
 [List of Pre Grant Publications for class 178 subclass 2C][List of Patents for class 178 subclass 2C]2C Subclass 2C indent level is 1 Way stations; party lines
 [List of Pre Grant Publications for class 178 subclass 2D][List of Patents for class 178 subclass 2D]2D Subclass 2D indent level is 1 Round robins
 [List of Pre Grant Publications for class 178 subclass 2E][List of Patents for class 178 subclass 2E]2E Subclass 2E indent level is 1 Satellite
 [List of Pre Grant Publications for class 178 subclass 2F][List of Patents for class 178 subclass 2F]2F Subclass 2F indent level is 1 Coin-controlled, connecting, recording
[List of Pre Grant Publications for class 178 subclass 70R][List of Patents for class 178 subclass 70R]  70R REPEATERS
[List of Pre Grant Publications for class 178 subclass 74][List of Patents for class 178 subclass 74]74 CIRCUITS
[List of Pre Grant Publications for class 178 subclass 77][List of Patents for class 178 subclass 77]77 COMBINED INSTRUMENTS
[List of Pre Grant Publications for class 178 subclass 79][List of Patents for class 178 subclass 79]79 CODE TRANSMITTERS
[List of Pre Grant Publications for class 178 subclass 118][List of Patents for class 178 subclass 118]118 RECEIVERS
[List of Pre Grant Publications for class 178 subclass 101][List of Patents for class 178 subclass 101]101 KEYS
[List of Pre Grant Publications for class 178 subclass 111][List of Patents for class 178 subclass 111]111 TAPES
 [List of Pre Grant Publications for class 178 subclass 114][List of Patents for class 178 subclass 114]114 INSTRUMENT TABLES
 [List of Pre Grant Publications for class 178 subclass 115][List of Patents for class 178 subclass 115]115 LEARNERS' INSTRUMENTS
 
FOREIGN ART COLLECTIONS
 
      FOR000          CLASS-RELATED FOREIGN DOCUMENTS
Any foreign patents or non-patent literature from subclasses that have been reclassified have been transferred directly to FOR Collections listed below. These Collections contain ONLY foreign patents or non-patent literature. The parenthetical references in the Collection titles refer to the abolished subclasses from which these Collections were derived.
     SYSTEMS
  FOR100          Subclass FOR100 indent level is 1 Writing (178/18)
      FOR101          Subclass FOR101 indent level is 2 Alternating current (178/19)
      FOR102          Subclass FOR102 indent level is 2 Variable direct current (178/20)
      FOR103          Subclass FOR103 indent level is 1 Stylus and tablet (178/87)