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| You are viewing a USPC Schedule. |
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| Class 340 | COMMUNICATIONS: ELECTRICAL |
| Click here for a printable version of this file | |
![[List of Pre Grant Publications for class 340 subclass 850]](../as.gif) | ![[List of Patents for class 340 subclass 850]](../ps.gif) | 850 | UNDERWATER |
| | 853.1 | WELLBORE TELEMETERING OR CONTROL (E.G., SUBSURFACE TOOL GUIDANCE, DATA TRANSFER, ETC.) |
| | 853.2 |  Diagnostic monitoring or detecting operation of communications equipment or signal |
| | 853.3 | Selective control of subsurface equipment |
| | 853.4 |  In horizontal or inclined drilling or passage |
| | 853.6 | Control of drill bit or apparatus (e.g., steering, speed, etc.) |
| | 853.7 | Repeater in subsurface link (e.g., cable, etc.) |
| | 853.8 | With orientation sensing of subsurface telemetering equipment (other than drilling equipment) |
| | 853.9 | Including detail of subsurface signal storage (e.g., memory, recorder, register, etc.) |
| | 854.1 | With position or depth recording (e.g., line payout, equipment locator, etc.) |
| | 854.3 | Using a specific transmission medium (e.g., conductive fluid, annular spacing, etc.) |
| | 854.4 | Drill string or tubing support signal conduction |
| | 854.5 | Wellbore casing or ground |
| | 854.6 | Electromagnetic energy (e.g., radio frequency, etc.) |
| | 854.7 |  Optical link (e.g., waveguide, etc.) |
| | 854.8 | Near field coupling (e.g., inductive, capacitive, etc.) |
| | 854.9 | Cable or wire (e.g., conductor as support, etc.) |
| | 855.3 | Multiplexed signals |
| | 855.4 | Pulse or digital signal transmission |
| | 855.7 | Modification of signal bandwidth, frequency, or circuit impedance at subsurface location |
| | 855.8 | Including specified power transmission feature or source (e.g., battery, etc.) |
| | 856.1 | In horizontal or inclined passage arrangement |
| | 856.2 | With expandable or inflatable sensor element or mounting |
| | 856.3 | Including particular sensor |
| | 870.01 | CONTINUOUSLY VARIABLE INDICATING (E.G., TELEMETERING) |
| | 870.02 | With meter reading |
| | 870.04 | With calibration |
| | 870.05 | With calculation |
| | 870.07 | Combined (TM system with other system) |
| | 870.1 | For radio sonde |
| | 870.11 | Plural transmitters |
| | 870.16 | Condition responsive |
| | 870.18 | Using a particular modulation (e.g., phase, frequency, or amplitude) |
| | 870.25 | Phase variation |
| | 870.26 | Frequency variation |
| | 870.27 | Plural circuits, each for particular magnitude |
| | 870.28 | Via radiant energy beam (via particular energy) |
| | 870.3 | With particular transmitter (e.g., piezoelectric, dynamo) |
| | 870.31 | Inductive transmitter |
| | 870.37 | Capacitive transmitter |
| | 870.38 | Resistive transmitter |
| | 870.39 | With supply voltage regulation or compensation |
| | 870.4 | With particular receiver (e.g., ratiometer) |
| | 901 | EXTERNAL CONDITION VEHICLE-MOUNTED INDICATOR OR ALARM |
| | 902 | Transmitter in another vehicle (e.g., emergency vehicle) |
| | 904 | Transmitter in one vehicle only |
| | 905 | Highway information (e.g., weather, speed limits, etc.) |
| | 906 | OVERRIDE OF TRAFFIC CONTROL INDICATOR BY COMMAND TRANSMITTER |
| | 907 | TRAFFIC CONTROL INDICATOR |
| | 908 | Portable |
| | 909 | Plural intersections under common central station control |
| | 910 | Central station responsive to traffic detectors |
| | 911 | Central station controls offset (time between beginning of same phase at adjacent intersections) |
| | 912 | Standby cycling implemented if invalid transmission received or loss of transmission occurs |
| | 913 | Offset control |
| | 914 | Split control |
| | 915 | Central station includes display of status of indicators |
| | 916 | Intersection normally under local controller |
| | 917 | Controller responsive to traffic detectors |
| | 918 | Controller, when changing right of way, alters or skips normal "go" cycle of street having no traffic detected |
| | 919 | Plural cross highways at intersection each have traffic detectors |
| | 922 | Density determines split |
| | 923 | Extension of time |
| | 924 | Local controller can be superceded by central station controller |
| | 925 | Pedestrian control |
| | 926 | Manual setting of cycle length and split times |
| | 927 | Rotating cam structure (specific structure required) |
| | 928 | Combined (e.g., toll systems, one-way) |
| | 929 | Indication of time remaining before change of phase |
| | 931 | Traffic control or local controller failure indicator |
| | 932 | Pacing (e.g., vehicle keeps pace with sequentially activated lights) |
| | 932.1 | Pivoted |
| | 932.2 | VEHICLE PARKING INDICATORS |
| | 933 | VEHICLE DETECTORS |
