Class   341	CODED DATA GENERATION OR CONVERSION
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DIGITAL PATTERN READING TYPE CONVERTER

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. (1 indent ) Plural denominationally related carriers (e.g., coarse/fine geared discs)

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. (1 indent ) Plural types of codes on single carrier

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. (1 indent ) According to nonlinear function

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. (1 indent ) For X or Y coordinate determination (e.g., stylus-pad)

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. (1 indent ) With directional discrimination

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. (1 indent ) Antiambiguity feature

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. (1 indent ) Real and complementary patterns

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. (1 indent ) Having combined (e.g., denominational, combination code) coding pattern

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.. (2 indent ) Constant distance code

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. (1 indent ) Incremental

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. (1 indent ) Cathode ray

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. (1 indent ) Optical

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.. (2 indent ) Having optical waveguide

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. (1 indent ) Magnetic, inductive or capacitive

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. (1 indent ) Brush and contacts or conductive pattern

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. (1 indent ) Actuated by physical projection

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BODILY ACTUATED CODE GENERATOR

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. (1 indent ) For handicapped user

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. (1 indent ) Including keyboard or keypad

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.. (2 indent ) Variable key legends

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.. (2 indent ) With error prevention means (e.g., debounce, antichatter)

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... (3 indent ) With rollover feature (i.e., antidoublestrike)

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.. (2 indent ) With particular key scanning feature

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.. (2 indent ) With audible or tactile indicator

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.. (2 indent ) For pictorial or ideographic characters (e.g., design, chinese or japanese characters)

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.. (2 indent ) With variable pulse spacing or grouping

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.. (2 indent ) For numerical pulse type transmission

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.. (2 indent ) Photoelectric actuation

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.. (2 indent ) Magnetic or inductive actuation

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.. (2 indent ) Capacitive actuation

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.. (2 indent ) Pressure sensitive actuation

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. (1 indent ) With rotary dial

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DIGITAL CODE TO DIGITAL CODE CONVERTERS

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. (1 indent ) Adaptive coding

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. (1 indent ) To or from particular bit symbol

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.. (2 indent ) Bit represented by pulse width

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.. (2 indent ) Bit represented by discrete frequency

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. (1 indent ) Substituting specified bit combinations for other prescribed bit combinations

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. (1 indent ) To or from multi-level codes

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.. (2 indent ) Binary to or from ternary

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. (1 indent ) To or from minimum d.c. level codes

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. (1 indent ) To or from run length limited codes

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. (1 indent ) To or from packed format

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. (1 indent ) Data rate conversion

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. (1 indent ) BCD (binary-coded-decimal) to or from decimal

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. (1 indent ) To or from bit count codes

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. (1 indent ) To or from number of pulses

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.. (2 indent ) To or from Huffman codes

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.. (2 indent ) To or from Morse code

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. (1 indent ) To or from variable length codes

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. (1 indent ) To or from NRZ (nonreturn-to-zero) codes

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.. (2 indent ) Return-to-zero to or from NRZ (nonreturn-to-zero) codes

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.. (2 indent ) To or from bi-phase level code (e.g., split phase code, Manchester code)

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.. (2 indent ) To or from bi-phase space or mark codes (e.g., double frequency code, FM code)

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.. (2 indent ) To or from delay modulation code (e.g., Miller code, three frequency code, MFM code)

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.. (2 indent ) To or from coded mark inversion

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.. (2 indent ) To or from double density code

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. (1 indent ) To or from nonlinear codes

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. (1 indent ) To or from differential codes

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.. (2 indent ) To or from delta modulation codes

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. (1 indent ) Programmable structure

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. (1 indent ) Tree structure

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. (1 indent ) To or from fibonacci codes

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. (1 indent ) To or from interleaved format

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. (1 indent ) To or from mixed code formats

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. (1 indent ) To or from mixed base codes

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.. (2 indent ) Binary to BCD (binary-coded decimal)

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.. (2 indent ) BCD (binary-coded decimal) to binary

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. (1 indent ) Generator runs until new code is generated

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. (1 indent ) Unnecessary data suppression

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. (1 indent ) Multiple conversions using same converter

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. (1 indent ) Reversible converters

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. (1 indent ) To or from alphanumeric code formats

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.. (2 indent ) To or from Baudot code

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.. (2 indent ) To or from Hollerith code

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. (1 indent ) Complementers

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. (1 indent ) With error detection or correction

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. (1 indent ) Byte length changed

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. (1 indent ) To or from constant distance codes

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.. (2 indent ) Gray to binary

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.. (2 indent ) Binary to Gray

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. (1 indent ) To or from display device codes

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. (1 indent ) Serial to parallel

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. (1 indent ) Parallel to serial

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. (1 indent ) To or from "N" out of "M" codes

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.. (2 indent ) "N" out of "M" to "X" out of "Y"

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. (1 indent ) Binary to decimal

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. (1 indent ) Decimal to binary

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. (1 indent ) Coding by table look-up techniques

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. (1 indent ) To or from code based on probability

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REVERSIBLE ANALOG TO DIGITAL CONVERTERS

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STOCHASTIC TECHNIQUES

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ANALOG TO DIGITAL CONVERSION FOLLOWED BY DIGITAL TO ANALOG CONVERSION

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PHASE OR TIME OF PHASE CHANGE

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. (1 indent ) Synchro or resolver signal

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.. (2 indent ) Coarse and fine

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.. (2 indent ) Control system

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.. (2 indent ) Converter compensation

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.. (2 indent ) Analog resolver or synchro signal to digital signal

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.. (2 indent ) Digital signal to analog resolver or synchro signal

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CONVERTER COMPENSATION

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. (1 indent ) Temperature compensation

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CONVERTER CALIBRATION OR TESTING

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. (1 indent ) Trimming control circuits

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SAMPLE AND HOLD

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. (1 indent ) Having variable sampling rate

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. (1 indent ) Sampled and held input signal with linear return to datum

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. (1 indent ) Sampled and held input signal with nonlinear return to datum

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ANALOG TO OR FROM DIGITAL CONVERSION

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. (1 indent ) Bipolar

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.. (2 indent ) Dual slope analog to digital converter

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.. (2 indent ) Plural slope analog to digital converter

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. (1 indent ) Difunction code as output

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. (1 indent ) Increasing converter resolution (e.g., dithering)

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. (1 indent ) Detecting analog signal peak

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. (1 indent ) With particular solid state devices (e.g., Gunn effect device, Josephson device, drift transistor, using solid state active devices as impedances) with other at longer intervals)

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.. (2 indent ) Integrated injection logic

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.. (2 indent ) Current mirror

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.. (2 indent ) Field effect transistor

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. (1 indent ) Using optical device, (e.g., fiber optics, cathode ray tubes)

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. (1 indent ) Nonlinear

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.. (2 indent ) Automatic control for increasing converter range (e.g., gain ranging, automatic gain control)

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.. (2 indent ) Linearization (e.g., nonlinear transfer characteristic compensates for nonlinear transducer)

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. (1 indent ) Multiplex

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. (1 indent ) Converter is part of control loop

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. (1 indent ) Differential encoder and/or decoder (e.g., delta modulation, differential pulse code modulation)

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. (1 indent ) Digital to analog conversion

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.. (2 indent ) Coarse and fine conversions

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.. (2 indent ) Serial conversion

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.. (2 indent ) Function generator

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.. (2 indent ) Tree structure

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.. (2 indent ) Using magnetic or cryogenic components

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.. (2 indent ) Using charge coupled devices or switched capacitances

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.. (2 indent ) Analog output represents a displacement or force

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.. (2 indent ) With intermediate conversion of digital value to time interval

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.. (2 indent ) Using weighted impedances

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.. (2 indent ) Using ladder network

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. (1 indent ) Analog to digital conversion

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.. (2 indent ) Coarse and fine conversions

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.. (2 indent ) Intermediate conversion to frequency or number of pulses

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.. (2 indent ) Analog input compared with static reference

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... (3 indent ) Parallel type

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.... (4 indent ) Including priority encoder

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... (3 indent ) Acting sequentially

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... (3 indent ) Serial conversions with change in signal

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... (3 indent ) Recirculating

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... (3 indent ) Single comparator and counter

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... (3 indent ) Single comparator and digital storage

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.. (2 indent ) Intermediate conversion to time interval

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... (3 indent ) Dual slope

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... (3 indent ) Plural slope

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... (3 indent ) Input signal compared with linear ramp

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... (3 indent ) Input signal compared with nonlinear ramp

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.. (2 indent ) Using magnetic or cryogenic components

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.. (2 indent ) Using charge transfer devices (e.g., charge coupled devices, charge transfer by switched capacitances)

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CODE GENERATOR OR TRANSMITTER

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. (1 indent ) Plural transmitters

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. (1 indent ) With code display at transmitter

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. (1 indent ) Transmitter for remote control signal

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. (1 indent ) Producing different pulse frequencies

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. (1 indent ) With variable pulse spacing or grouping

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.. (2 indent ) Plural pulse shapes

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.. (2 indent ) Plural channels

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.. (2 indent ) Carrier frequency variation

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.. (2 indent ) With variable pulse length

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.. (2 indent ) Pulse presence or absence in equal length code

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. (1 indent ) Numerical pulse type

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.. (2 indent ) Multistage

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.. (2 indent ) With gaseous or space discharge device

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.. (2 indent ) Having counter or register

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.. (2 indent ) Serial pulse number actuation

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.. (2 indent ) Pulse gating

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.. (2 indent ) Mechanical switch feature

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. (1 indent ) With gaseous or space discharge device feature

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. (1 indent ) With rotary distributor

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QUANTIZER

899

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