Cooperative Patent Classification


Version: 2017.08
CPC
COOPERATIVE PATENT CLASSIFICATION
G04G
ELECTRONIC TIME-PIECES [2013-01]
NOTES

  • This subclass covers:
    • electronic time-pieces with no moving parts;
    • electronic circuitry for producing timing pulses irrespective of the nature of the time indicating means utilised.
  • This subclass does not cover electronic time-pieces with moving parts, which are covered by subclass G04C.
G04G 3/00
Producing timing pulses (driving circuits for stepping motors G04C 3/14; producing preselected time intervals for use as timing standards G04F 5/00; pulse technique in general H03K; control, synchronisation, or stabilisation of generators in general H03L) [2013-01]
G04G 3/02
.
Circuits for deriving low frequency timing pulses from pulses of higher frequency (pulse frequency dividers in general H03K 23/00 - H03K 29/00) [2016-05]
G04G 3/022
. .
{the desired number of pulses per unit of time being obtained by adding to or substracting from a pulse train one or more pulses (in general G06F 7/68)} [2013-01]
G04G 3/025
. .
{by storing time-date which are periodically investigated and modified accordingly, e.g. by using cyclic shift-registers} [2013-01]
G04G 3/027
. .
{by combining pulse-trains of different frequencies, e.g. obtained from two independent oscillators or from a common oscillator by means of different frequency dividing ratios (sychronisation of electric time pieces G04G 7/00, G04C 11/00)} [2013-01]
G04G 3/04
.
Temperature-compensating arrangements [2013-01]
G04G 5/00
Setting, i.e. correcting or changing, the time-indication (radio-controlled time-pieces G04R) [2013-01]
G04G 5/002
.
{brought into action by radio} [2016-11]
G04G 5/005
.
{Debouncing circuits} [2013-01]
G04G 5/007
.
{by using a separate register into which the entire correct setting is introduced, which is thereafter transferred to the time counters} [2013-01]
G04G 5/02
.
by temporarily changing the number of pulses per unit time, e.g. quick-feed method [2013-01]
G04G 5/022
. .
{quick-feed method} [2016-11]
G04G 5/025
. . .
{the time-counters first being reset to zero} [2013-01]
G04G 5/027
. .
{by adding or suppressing individual pulses, e.g. for step-motor} [2016-11]
G04G 5/04
.
by setting each of the displayed values, e.g. date, hour, independently [2013-01]
G04G 5/041
. .
{Correction of the minutes counter in function of the seconds' counter position at zero adjustment of the latter} [2013-01]
G04G 5/043
. .
{using commutating devices for selecting the value, e.g. hours, minutes, seconds, to be corrected} [2016-11]
G04G 5/045
. . .
{using a sequential electronic commutator} [2016-11]
G04G 5/046
. . . .
{by using a separate register into which the correct setting of one of the counters is introduced which is thereafter transferred to the selected time-counter to be reset} [2013-01]
G04G 5/048
. . .
{by using a separate register into which the correct setting of the selected time-counter is introduced which is thereafter transferred to the time-counter to be reset} [2017-05]
G04G 7/00
Synchronisation (radio-controlled time-pieces G04R) [2013-01]
G04G 7/005
.
{provided with arrangements to prevent synchronisation by interfering signals (G04G 7/023 takes precedence)} [2013-01]
G04G 7/02
.
{by radio} [2016-11]
G04G 7/023
. .
{provided with arrangements to prevent synchronisation by interfering signals} [2013-01]
G04G 7/026
. .
{the time-piece preparing itself on set times on the reception of the synchronising signal} [2013-01]
G04G 9/00
Visual time or date indication means [2013-01]
G04G 9/0005
.
{Transmission of control signals} [2013-01]
G04G 9/0011
. .
{using coded signals (synchronisation combined with automatic setting at regular intervals, e.g. by coded signals G04G 7/00)} [2013-01]
G04G 9/0017
.
{in which the light emitting display elements may be activated at will or are controlled in accordance with the ambient light} [2013-01]
G04G 9/0023
.
{by light valves in general (G04G 9/06, G04G 9/12 takes precedence; electro-, magneto- or acousto-optic devices in general G02F 1/00)} [2013-01]
G04G 9/0029
. .
{Details} [2013-01]
G04G 9/0035
. . .
{constructional} [2013-01]
G04G 9/0041
. . . .
{Illumination devices} [2013-01]
G04G 9/0047
. . .
{electrical, e.g. selection or application of the operating voltage} [2013-01]
G04G 9/0052
. . . .
{using means to adjust the display in accordance with the ambient light, e.g. switching or controlling a supplementary light source} [2013-01]
G04G 9/0058
.
{using a cathode ray tube as display device (displaying supplementary informative, e.g. time on TV screen H04N 5/445)} [2013-01]
G04G 9/0064
.
{in which functions not related to time can be displayed (digital output to display devices of digital computers G06F 3/14)} [2013-01]
G04G 9/007
. .
{combined with a calculator or computing means} [2013-01]
G04G 9/0076
.
{in which the time in another time-zone or in another city can be displayed at will} [2013-01]
G04G 9/0082
.
{by building-up characters using a combination of indicating elements and by selecting desired characters out of a number of characters or by selecting indicating elements the positions of which represents the time, i.e. combinations of G04G 9/02 and G04G 9/08} [2013-01]
G04G 9/0088
. .
{by controlling light sources, e.g. electroluminescent diodes} [2013-01]
G04G 9/0094
. .
{using light valves, e.g. liquid crystals} [2013-01]
G04G 9/02
.
by selecting desired characters out of a number of characters or by selecting indicating elements the position of which represent the time, e.g. by using multiplexing techniques {(G04G 9/0082 takes precedence)} [2017-08]
G04G 9/022
. .
{using multiplexing techniques} [2013-01]
G04G 9/025
. .
{provided with date indication} [2013-01]
G04G 9/027
. .
{provided with means for displaying at will a time indication or a date or a part thereof} [2013-01]
G04G 9/04
. .
by controlling light sources, e.g. electroluminescent diodes {(G04G 9/0058 takes precedence)} [2013-01]
G04G 9/042
. . .
{using multiplexing techniques} [2013-01]
G04G 9/045
. . .
{provided with date indication} [2013-01]
G04G 9/047
. . .
{provided with means for displaying at will a time indication or a date or a part thereof} [2013-01]
G04G 9/06
. .
using light valves, e.g. liquid crystals [2013-01]
G04G 9/062
. . .
{using multiplexing techniques} [2013-01]
G04G 9/065
. . .
{using a drop of liquid suspended by capillary forces and moved by an electric field} [2013-01]
G04G 9/067
. . .
{using mechano-optical means} [2013-01]
G04G 9/08
.
by building-up characters using a combination of indicating elements, e.g. by using multiplexing techniques {(G04G 9/0082 takes precedence)} [2013-01]
G04G 9/082
. .
{using multiplexing techniques} [2013-01]
G04G 9/085
. .
{provided with date indication} [2013-01]
G04G 9/087
. .
{provided with means for displaying at will a time indication or a date or a part thereof} [2013-01]
G04G 9/10
. .
by controlling light sources, e.g. electroluminescent diodes {(G04G 9/0058 takes precedence)} [2013-01]
G04G 9/102
. . .
{using multiplexing techniques} [2013-01]
G04G 9/105
. . .
{provided with date indication} [2013-01]
G04G 9/107
. . .
{provided with means for displaying at will a time indication or a date or a part thereof} [2013-01]
G04G 9/12
. .
using light valves, e.g. liquid crystals [2013-01]
G04G 9/122
. . .
{using multiplexing techniques} [2013-01]
G04G 9/124
. . .
{provided with date indication} [2013-01]
G04G 9/126
. . .
{provided with means for displaying at will a time indication or a date or a part thereof} [2013-01]
G04G 9/128
. . .
{using mechano-optical means} [2013-01]
G04G 11/00
Producing optical signals at preselected times [2013-01]
G04G 13/00
Producing acoustic time signals [2013-01]
G04G 13/02
.
at preselected times, e.g. alarm clocks [2013-01]
G04G 13/021
. .
{Details} [2013-01]
G04G 13/023
. . .
{Adjusting the duration or amplitude of signals} [2013-01]
G04G 13/025
. .
{acting only at one preselected time} [2013-01]
G04G 13/026
. .
{acting at a number of different times} [2013-01]
G04G 13/028
. .
{combined with a radio} [2013-01]
G04G 15/00
Time-pieces comprising means to be operated at preselected times or after preselected time intervals (G04G 11/00, G04G 13/00 take precedence; {electronic timers G04F 1/005 }; pulse delay circuits H03K 5/13; electronic time-delay switches H03K 17/28; electronic time-programme switches which automatically terminate their operation after the programme is completed H03K 17/296) [2013-01]
G04G 15/003
.
{acting only at one preselected time or during one adjustable time interval} [2013-01]
G04G 15/006
.
{for operating at a number of different times (cigar or cigarette receptacles or boxes with means for limiting the frequency of smoking A24F 15/005)} [2013-01]
G04G 17/00
Structural details; Housings (constructional details of radio-controlled time-pieces, e.g. antennas G04R 60/00) [2013-01]
G04G 17/005
.
{Time-pieces combined with games} [2013-01]
G04G 17/02
.
Component assemblies [2013-01]
G04G 17/04
. .
Mounting of electronic components [2013-01]
G04G 17/045
. . .
{Mounting of the display} [2013-01]
G04G 17/06
. .
Electric connectors, e.g. conductive elastomers [2013-01]
G04G 17/08
.
Housings [2013-01]
G04G 17/083
. .
{Watches distributed over several housings} [2013-01]
G04G 17/086
. .
{Desktop clocks} [2013-01]
G04G 19/00
Electric power supply circuits specially adapted for use in electronic time-pieces [2013-01]
G04G 19/02
.
Conversion or regulation of current or voltage [2013-01]
G04G 19/04
. .
Capacitive voltage division or multiplication [2013-01]
G04G 19/06
. .
Regulation [2013-01]
G04G 19/08
.
Arrangements for preventing voltage drop due to overloading the power supply [2013-01]
G04G 19/10
.
Arrangements for supplying back-up power [2013-01]
G04G 19/12
.
Arrangements for reducing power consumption during storage [2013-01]
G04G 21/00
Input or output devices integrated in time-pieces [2013-01]
G04G 21/02
.
Detectors of external physical values, e.g. temperature [2013-01]
G04G 21/025
. .
{for measuring physiological data} [2013-01]
G04G 21/04
.
using radio waves (radio-controlled time-pieces G04R) [2013-01]
G04G 21/06
.
using voice [2013-01]
G04G 21/08
.
Touch switches specially adapted for time-pieces [2013-01]
G04G 99/00
Subject matter not provided for in other groups of this subclass [2013-01]
G04G 99/003
.
{Pulse shaping; Amplification} [2013-01]
G04G 99/006
.
{Electronic time-pieces using a microcomputer, e.g. for multi-function clocks} [2017-08]