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Classification Resources
 
Class   398OPTICAL COMMUNICATIONS
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[List of Pre Grant Publications for class 398 subclass 1][List of Patents for class 398 subclass 1]1 FAULT RECOVERY
[List of Pre Grant Publications for class 398 subclass 9][List of Patents for class 398 subclass 9]9 DIAGNOSTIC TESTING
 [List of Pre Grant Publications for class 398 subclass 39][List of Patents for class 398 subclass 39]39 INTERFERENCE SIGNAL TRANSMISSION OR ELIMINATION (E.G., JAMMING OR ANTIJAMMING)
 [List of Pre Grant Publications for class 398 subclass 40][List of Patents for class 398 subclass 40]40 EAVESDROPPING
[List of Pre Grant Publications for class 398 subclass 41][List of Patents for class 398 subclass 41]41 DUPLEX
[List of Pre Grant Publications for class 398 subclass 43][List of Patents for class 398 subclass 43]43 MULTIPLEX
[List of Pre Grant Publications for class 398 subclass 104][List of Patents for class 398 subclass 104]104 UNDERWATER
[List of Pre Grant Publications for class 398 subclass 106][List of Patents for class 398 subclass 106]106 REMOTE CONTROL
[List of Pre Grant Publications for class 398 subclass 115][List of Patents for class 398 subclass 115]115 HYBRID COMMUNICATION SYSTEM (E.G., OPTICAL AND RF)
[List of Pre Grant Publications for class 398 subclass 118][List of Patents for class 398 subclass 118]118 OPTICAL COMMUNICATION OVER FREEE SPACE
[List of Pre Grant Publications for class 398 subclass 132][List of Patents for class 398 subclass 132]132 PHOTOPHONE
[List of Pre Grant Publications for class 398 subclass 135][List of Patents for class 398 subclass 135]135 OPTICAL TRANSCEIVER
[List of Pre Grant Publications for class 398 subclass 140][List of Patents for class 398 subclass 140]140 TRANSMITTER AND RECEIVER SYSTEM
[List of Pre Grant Publications for class 398 subclass 173][List of Patents for class 398 subclass 173]173 OPTICAL REPEATER SYSTEM
[List of Pre Grant Publications for class 398 subclass 182][List of Patents for class 398 subclass 182]182 TRANSMITTER
[List of Pre Grant Publications for class 398 subclass 202][List of Patents for class 398 subclass 202]202 RECEIVER
 
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.
  FOR100          OPTICAL COMMUNICATION (359/109)
      FOR101          Subclass FOR101 indent level is 1 Diagnostic testing of optical communication (359/110)
      FOR102          Subclass FOR102 indent level is 1 Interference signal transmission or elimination (e.g., jamming or antijamming (359/111)
      FOR103          Subclass FOR103 indent level is 1 Eavesdropping (359/112)
  FOR104          Subclass FOR104 indent level is 1 Duplex (359/113)
      FOR105          Subclass FOR105 indent level is 2 Wavelength division (359/114)
  FOR106          Subclass FOR106 indent level is 1 Multiplex (359/115)
      FOR107          Subclass FOR107 indent level is 2 Mode (359/116)
      FOR108          Subclass FOR108 indent level is 2 Spatial or switching (359/117)
  FOR109          Subclass FOR109 indent level is 2 Optical local area network (LAN) (359/118)
      FOR110          Subclass FOR110 indent level is 3 Loop (359/119)
      FOR111          Subclass FOR111 indent level is 3 Active star (359/120)
      FOR112          Subclass FOR112 indent level is 3 Passive star (359/121)
      FOR113          Subclass FOR113 indent level is 2 Polarization (359/122)
      FOR114          Subclass FOR114 indent level is 2 Time and frequency division (359/123)
  FOR115          Subclass FOR115 indent level is 2 Wavelength division/frequency division (includes scattering, e.g., Raman, Brillouin, etc.) (359/124)
  FOR116          Subclass FOR116 indent level is 3 Subscriber system (359/125)
  FOR118          Subclass FOR118 indent level is 3 By optical coupling (359/127)
      FOR119          Subclass FOR119 indent level is 4 Switch (359/128)
      FOR120          Subclass FOR120 indent level is 4 Prism (359/129)
      FOR121          Subclass FOR121 indent level is 4 Grating (359/130)
      FOR122          Subclass FOR122 indent level is 4 Lens (359/131)
      FOR123          Subclass FOR123 indent level is 3 Single source, electrically controlled (359/132)
  FOR124          Subclass FOR124 indent level is 3 Different sources (359/133)
      FOR125          Subclass FOR125 indent level is 4 With pump (359/134)
  FOR126          Subclass FOR126 indent level is 2 Time division (359/135)
      FOR127          Subclass FOR127 indent level is 3 Multiple access (e.g., CSMA, CDMA) (359/136)
      FOR128          Subclass FOR128 indent level is 3 Subscriber system (359/137)
  FOR129          Subclass FOR129 indent level is 3 By specific optical element (359/138)
      FOR130          Subclass FOR130 indent level is 4 Optical switch (359/139)
      FOR131          Subclass FOR131 indent level is 3 With delay (359/140)
      FOR132          Subclass FOR132 indent level is 1 Underwater (359/141)
  FOR133          Subclass FOR133 indent level is 1 Remote control (359/142)
  FOR140          Subclass FOR140 indent level is 1 Photophone (359/149)
  FOR143          Subclass FOR143 indent level is 1 Optical transceiver (359/152)
      FOR144          Subclass FOR144 indent level is 2 Including compensation (359/153)
  FOR145          Subclass FOR145 indent level is 1 Transmitter and receiver system (359/154)
  FOR165          Subclass FOR165 indent level is 1 Optical repeater system (359/174)
      FOR166          Subclass FOR166 indent level is 2 Demodulating (359/175)
  FOR167          Subclass FOR167 indent level is 2 Regenerative (359/176)
      FOR168          Subclass FOR168 indent level is 3 Monitoring (359/177)
      FOR169          Subclass FOR169 indent level is 2 Star (359/178)
      FOR170          Subclass FOR170 indent level is 2 Including optical waveguide (359/179)
  FOR171          Subclass FOR171 indent level is 1 Transmitter (359/180)
  FOR172          Subclass FOR172 indent level is 2 With particular modulation (359/181)
      FOR173          Subclass FOR173 indent level is 3 Frequency modulation (359/182)
      FOR174          Subclass FOR174 indent level is 3 Phase modulation (359/183)
  FOR175          Subclass FOR175 indent level is 3 Pulse modulation (359/184)
      FOR176          Subclass FOR176 indent level is 4 Pulse-code (359/185)
      FOR177          Subclass FOR177 indent level is 4 Pulse time (359/186)
      FOR178          Subclass FOR178 indent level is 2 With feedback (359/187)
      FOR179          Subclass FOR179 indent level is 2 Including optical waveguide (359/188)
  FOR180          Subclass FOR180 indent level is 1 Receiver (359/189)
      FOR181          Subclass FOR181 indent level is 2 Homodyne (359/190)
  FOR182          Subclass FOR182 indent level is 2 Heterodyne (359/191)
      FOR183          Subclass FOR183 indent level is 3 With polarization (359/192)
      FOR184          Subclass FOR184 indent level is 2 With optical element (e.g., lens, mirror, etc.) (359/193)
      FOR185          Subclass FOR185 indent level is 2 Automatic gain control (359/194)
      FOR186          Subclass FOR186 indent level is 2 With optical waveguide) (359/195)
United States Patent and Trademark Office